10 Storage Accessories for Maximizing Space in Your RV Exterior Bay

Stepping outside your rig only to spend twenty minutes digging through a chaotic basement bay for a single water fitting is a frustrating experience that every RVer wants to avoid. Exterior storage space is incredibly precious, yet these large cavities quickly turn into black holes of tangled hoses, loose tools, and sliding plastic bins. Maximizing this footprint requires a strategic mix of heavy-duty hardware and smart organizational accessories that keep your gear accessible, secure, and perfectly balanced.

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Assessing Your RV Exterior Bay Storage Capacity

Before purchasing a single bin or slide, you must map out your physical dimensions and weight limits. Measure the height, width, and depth of each bay door opening, as these clearances are often smaller than the actual interior compartment dimensions. Note the locations of any protruding plumbing lines, electrical conduits, or chassis frame rails that will obstruct large items.

Next, classify your gear into immediate-access items and long-term storage goods. Emergency roadside tools, fresh water hoses, and leveling blocks need to sit near the door openings, while seasonal gear or spare parts can live in the hard-to-reach center of pass-through bays. Grouping items by utility prevents you from unpacking half the rig just to perform a routine setup at a new campsite.

Sliding Cargo Tray – MORryde CTG60-2090W Cargo Slide

Crawling into a dark pass-through bay to retrieve heavy items buried in the center is a recipe for back strain. A sliding cargo tray solves this by bringing the entire contents of your storage compartment out into the open air. By turning deep, inaccessible voids into roll-out shelves, you gain instant access to every square inch of space without any physical contortions.

The MORryde CTG60-2090W Cargo Slide stands out because of its rugged 800-pound weight capacity and dual-direction travel design. This unit pulls out from either side of your pass-through bay, utilizing a ball-bearing slide system that glides smoothly even when fully loaded with heavy tools or generators. Its steel construction and durable carpeted deck ensure your gear stays put and does not suffer damage from shifting during transit.

Before installing, verify that your bay floor is structurally sound and can support both the slide’s weight and its concentrated load capacity. You will lose about two to three inches of vertical clearance to the slide’s frame, which can be a dealbreaker in shallow bays. This premium upgrade is perfect for full-time travelers carrying heavy gear, but it may be unnecessary for weekenders with lightweight setups.

• Dimensions: 20″ x 90″ (fits most standard pass-through compartments)
• Weight Capacity: 800 lbs
• Key Feature: Two-way travel for dual-sided access

Heavy-Duty Storage Tote – Plano Sportsman Trunk

Standard household storage bins quickly crack under the stress of road vibration, extreme temperature swings, and heavy tools. A heavy-duty storage tote acts as a rugged, stackable vault that protects your gear from dust, moisture, and impact damage. It keeps loose items clustered together so they cannot slide around and damage the interior walls of your utility bays.

The Plano Sportsman Trunk is the preferred choice for mobile life due to its high-impact plastic construction and reinforced molded grooves that make stacking incredibly secure. Unlike cheap alternatives, these trunks feature heavy-duty snap-down latches and integrated padlock tabs for added security when stored in semi-exposed areas. The recessed handles are molded directly into the frame, ensuring they won’t snap off when lifting a heavy load.

While these trunks are highly weather-resistant, they do not feature a rubberized gasket seal, meaning they are not fully submersible in extreme off-road environments. Make sure to measure your bay opening height carefully to ensure you can lift a stacked pair through the door frame. This tote is ideal for storing heavy recovery gear, spare parts, and campsite setup tools that need to stay dry.

• Size Options: 56-Quart, 68-Quart, and 108-Quart capacities
• Features: Molded grooves for non-slip stacking, tie-down brackets
• Durability: Heavy-duty rustproof plastic with reinforced lids

Hose Reel – Shoreline Reels CC50D Power Hose Reel

Coiling heavy-duty freshwater hoses or 50-amp shore power cords by hand is a tedious chore that often results in kinked lines and wasted space. A dedicated hose reel anchors these bulky utilities to a single, compact footprint inside your utility bay. By keeping these stiff cables wound tightly, you eliminate the chaotic “spaghetti pile” that commonly overtakes wet bays.

The Shoreline Reels CC50D Power Hose Reel is engineered to handle up to 50 feet of 50-amp power cord or heavy-duty water hose with minimal effort. This manual reel features a heavy-duty steel frame, a smooth brass swivel path, and a positive locking mechanism that prevents the line from unspooling while driving. Its compact design allows it to be mounted permanently to the bay floor or a slide-out tray, keeping your utility connections organized and ready to deploy.

Mounting this unit requires drilling into your bay floor, so you must verify what lies directly beneath your mounting surface before securing the fasteners. It operates manually with a hand crank, which requires a small amount of physical clearance on the side of the reel for your hand to spin the handle freely. This reel is an essential investment for travelers dealing with stiff, heavy-gauge electrical cords, but simpler bags might suffice for lightweight, 15-amp setups.

• Capacity: Holds up to 50 feet of 50-amp cord or 100 feet of water hose
• Materials: Powder-coated steel frame with brass fittings
• Mounting: Floor-mount configuration for permanent placement

Utility Storage Bag – Camco Fresh Water Hose Bag

When space is too tight for rigid reels or hard-sided tubs, flexible storage bags offer a lightweight, space-saving alternative. These bags keep critical sanitizing and water delivery components separate, preventing cross-contamination between your fresh water supply and your sewer gear. When empty, they collapse down flat, freeing up valuable physical real estate inside your utility compartments.

The Camco Fresh Water Hose Bag excels here with its color-coded blue design and breathable mesh top that allows wet hoses to air-dry without trapping mold-inducing moisture. The interior is lined with a waterproof barrier, while the heavy-duty zipper and reinforced carrying handle ensure it can handle the weight of a standard 25-foot drinking hose. It keeps your fresh water gear isolated, clean, and easily identifiable at a glance.

Keep in mind that these bags are designed for flexible hoses; stiff, low-quality hoses can be difficult to coil tightly enough to fit inside the zippered opening. Overstuffing the bag can strain the seams over time, so it is best to buy separate bags for your drinking water hoses, grey water lines, and electrical adapters. This is an indispensable, budget-friendly accessory for any RVer looking to keep their wet bay sanitary.

• Dimensions: 12″ diameter x 3″ depth
• Materials: Heavy-duty fabric with a breathable mesh upper section
• Color-Coding: Blue for fresh water, black for sewer, yellow for electrical

Magnetic Tool Bar – Master Magnetics 13-Inch Strip

Rummaging through a tool chest for a basic screwdriver or wrench during a quick roadside adjustment is incredibly inefficient. A magnetic tool bar mounts directly to the walls or door interiors of your exterior bays, turning unused vertical surfaces into instant storage. This keeps your most frequently used metal hand tools visible and within arm’s reach at all times.

The Master Magnetics 13-Inch Strip utilizes a powerful neodymium magnetic core encased in a durable steel channel that holds heavy hand tools securely, even over rough washboard roads. It comes with pre-drilled mounting holes and heavy-duty screws, allowing for a quick installation on wood, metal, or fiberglass bay liners. This strip keeps hammers, pliers, and wrenches locked in place so they cannot roll around and scratch your bay interiors.

Because the magnetic pull is incredibly strong, you must mount the bar to a solid backing material; securing it to thin plastic or flimsy paneling can cause the wall to bow or crack when pulling tools off the strip. Ensure that sensitive electronics are not stored directly adjacent to where you mount this bar. This accessory is a game-changer for those who perform frequent maintenance, but it won’t hold non-ferrous aluminum or plastic tools.

• Length: 13 inches
• Weight Capacity: Holds up to 20 lbs of steel tools per linear inch
• Installation: Flush-mount screws included

Cargo Netting – Organized Obie Barrier Net

Open shelving and upper cavities in exterior bays are prone to shifting, causing gear to spill out as soon as you open the bay door. Cargo netting acts as a flexible safety barrier, keeping loose items, camp chairs, and folded tarps securely pinned against the walls or ceiling. This allows you to utilize high, awkward spaces that would otherwise remain completely wasted.

The Organized Obie Barrier Net is built specifically for the vibrations of mobile travel, featuring a heavy-duty polypropylene webbing that resists rot, mildew, and UV degradation. It uses secure mounting footman loops and quick-release buckles, allowing you to easily peel back the net to access your gear and clip it back into place in seconds. The net retains its tension over time, unlike cheap elastic nets that sag after a few months of holding heavy items.

Installing this net requires securing mounting hardware to your bay walls, so you must verify the structural integrity of your bay lining beforehand. It is essential to choose the correct size for your specific opening to ensure proper tension; a net that is too loose will allow items to slip underneath. This accessory is perfect for holding lightweight, bulky items like sleeping bags, folding tables, and outdoor rugs against the ceiling of your pass-through bays.

• Materials: Non-stretch polypropylene webbing with heavy-duty plastic buckles
• Sizes: Available in various custom dimensions to fit different bay heights
• Hardware: Includes mounting brackets and self-tapping screws

Cargo Bar – Keeper 05059 Ratcheting Cargo Bar

During transit, large, heavy items like generators, storage tubs, and auxiliary fuel cans have a tendency to slide across your pass-through bays, damaging your gear and altering your rig’s weight distribution. A cargo bar acts as an adjustable structural wall, locking your heavy gear into a dedicated zone of the compartment. This prevents shifting without requiring permanent, intrusive tie-down straps or floor anchors.

The Keeper 05059 Ratcheting Cargo Bar stands out due to its heavy-duty ratcheting mechanism and large, non-marring rubber grip pads that hold fast against fiberglass, wood, or metal walls. The steel bar adjusts smoothly from 40 inches to 70 inches, allowing it to span the width of almost any standard RV storage bay. Its robust construction ensures it won’t bend or lose tension when subjected to the severe vibrations of bumpy backcountry roads.

Because this bar applies substantial outward pressure to hold itself in place, you must only tension it against structurally solid areas of your chassis or bay frame. Applying too much force against thin, unsupported fiberglass partition walls can warp or crack the panels. This tool is highly recommended for anyone hauling heavy, boxy cargo, but it is less effective for securing small, irregular loose items on its own.

• Adjustment Range: 40″ to 70″ (expandable up to 108″ with optional extensions)
• Build: Heavy-duty steel tubing with rust-resistant finish
• Pads: 3″ x 2-1/2″ pivoting rubber feet for secure grip

Storage Strap – Wrap-It Heavy Duty Storage Strap

Tangled extension cords, dog leashes, and utility ropes are constant sources of clutter that quickly fill up drawers and shelves in your exterior compartments. Storage straps allow you to bundle these limp items tightly and hang them from hooks, keeping them organized and off the floor. This simple action clears up valuable floor space while preventing cords from knotting together during travel.

The Wrap-It Heavy Duty Storage Strap is built for extreme environments, utilizing weatherproof polypropylene and a commercial-grade hook-and-loop closure that holds up to 50 pounds. It features a heavy-duty rustproof grommet at the top, allowing you to hang bundled cables directly from wall hooks or pegboards inside your bays. The strap’s heavy-duty construction means it can be opened and closed thousands of times without losing its grip.

When using these straps to hang heavy cords, ensure the wall hooks you hang them from are securely anchored into studs or solid backing material. Using a strap that is too large for a thin cord can leave excess material hanging, which can catch on other gear when sliding items in and out of the bay. These straps are an affordable, essential organizational tool for every RVer, from weekend warriors to full-time boondockers.

• Size Range: Available in sizes from 7-inch to 28-inch lengths
• Weight Capacity: Supports up to 50 lbs (depending on size)
• Material: Weatherproof industrial-strength polypropylene and nylon

Mounting Clamp – Quick Fist Original Clamp

Storing long, awkward tools like axes, shovels, and sewer hose support ramps can be a logistical nightmare in a crowded storage bay. Mounting clamps allow you to secure these items horizontally or vertically along the unused walls or ceiling of your compartments. This keeps sharp or dirty tools safely off the floor and away from delicate gear like fresh water hoses and electrical cables.

The Quick Fist Original Clamp is the gold standard for tool mounting, constructed from heavy-duty transportation-grade rubber that is completely unaffected by hot or cold climates and UV exposure. It holds objects from 1 inch to 2.25 inches in diameter, securing them with a simple, adjustable strap that snaps closed and releases in seconds. With a working load limit of 25 pounds per clamp, it easily handles heavy-duty hand tools without slipping.

Installation requires mounting the clamp using a single #10 bolt or screw, meaning you will need a solid mounting surface to prevent the clamp from ripping out under load. Be sure not to overtighten the mounting screw, as doing so can distort the rubber base and weaken its holding power. These clamps are ideal for rugged off-road travelers who need to keep emergency recovery tools secure and rattle-free.

• Grip Range: Fits objects from 1″ to 2.25″ in diameter
• Weight Capacity: Supports up to 25 lbs per clamp (50 lbs per pair)
• Material: Heavy-duty, UV-resistant synthetic rubber

Chassis Box – Lippert Underchassis Storage Unit

When your existing exterior bays are completely packed, the only way to gain more storage is to look underneath your rig’s chassis. The open space between your RV’s frame rails is a prime location for mounting heavy, weather-resistant storage compartments. This approach frees up prime real estate in your main bays for items that require frequent daily access.

The Lippert Underchassis Storage Unit is designed to capitalize on this dead space, featuring a heavy-duty plastic bin system that mounts directly to your trailer or motorhome chassis rails. The bin slides out smoothly on a steel frame, allowing you to access spare parts, sewer hoses, or leveling blocks without having to crawl under the rig. Its sealed lid keeps road grime, water, and salt from damaging your stored items during long highway hauls.

Before purchasing, you must verify your RV’s ground clearance and measure the distance between your frame rails to ensure a proper fit. This unit is not suitable for low-slung rigs or those that frequently traverse aggressive off-road terrain where bottoming out is a risk. It is a premium, highly effective storage solution for fifth wheels and travel trailers needing extra room for messy, outdoor-only gear.

• Configuration: Dual-bin drawer design with a steel mounting bracket
• Material: Heavy-duty, impact-resistant molded plastic
• Compatibility: Fits standard I-beam chassis frames with at least 12″ of clearance

Weight Distribution Rules for RV Exterior Bays

Organizing your exterior bays is not just about fitting as much gear as possible; it is also a critical safety issue that directly impacts how your RV handles on the highway. Overloading one side of your rig can cause uneven tire wear, strain your suspension, and lead to dangerous trailer sway or poor braking performance. You must balance your heavy gear—such as toolkits, generators, and full water tanks—evenly across both the driver and passenger sides of the chassis.

Additionally, pay close attention to your rig’s front-to-back weight balance, especially regarding your tongue weight or pin weight. Placing too much heavy gear in the front pass-through bay can overload your tow vehicle’s hitch, while placing too much weight in the far rear bays can unload the tongue, causing catastrophic trailer sway at high speeds. Keep your heaviest items stored low to the ground and as close to the axles as possible to maintain a stable center of gravity.

Finally, always consult your RV’s Cargo Carrying Capacity (CCC) sticker, which is typically located on the entry door or inside a cabinet. Never exceed the weight limits of the individual storage bays, which are often reinforced only with lightweight aluminum framing or thin plywood floors. Regularly visiting a CAT scale during your travels is the best way to verify that your axle loads and overall weight distribution remain within safe, legal limits.

Conclusion

Optimizing your RV’s exterior storage bays transforms the chaotic chore of campsite setup into a seamless, stress-free routine. By combining heavy-duty sliding hardware, secure mounts, and smart balancing techniques, you protect your valuable gear while ensuring your rig operates safely on the highway. Invest the time to map out your bays and choose the right structural accessories, and you will enjoy a more organized, peaceful life on the open road.