Pest Control for RVs and Campers: Mice, Ants, and the Winter Storage Fight

Pest control for an RV or camper is mostly a do-it-yourself category, and that is appropriate. A realistic annual spend is $20–$80 in traps, sealant, copper mesh, and deterrents that actually work. Professional RV treatments exist at one-time prices of roughly $150–$300 in 2026, but access is tight, square footage is small, and most of the effective work — sealing openings and removing food — is something the owner has to do anyway. Prices vary by region and company. Three pests account for nearly all of the trouble.

Mice in winter storage: the number one problem

A stored RV is a dry, sheltered box with wiring to chew and upholstery to nest in, and mice find the openings before you do. The effective program is unglamorous and inexpensive.

• Seal the openings. Pack copper mesh or coarse steel wool into gaps around pipe penetrations, the water heater, the furnace, the shore power inlet, and any place a pencil fits. Seal with expanding foam rated for the application, but back it with mesh so rodents cannot chew through.
• Remove every food source. Empty cabinets, vacuum thoroughly, remove pet food, birdseed, and anything in a cardboard box. A single forgotten granola bar is enough.
• Remove bedding and nesting material. Stored blankets, pillows, and paper are the reward for getting inside.
• Run trap lines. Snap traps along the interior walls, in the storage bays, and near the entry points. Check them monthly — a trap line that is never checked is decoration.
• Skip the folk remedies. Dryer sheets, mothballs, and ultrasonic plug-ins have poor evidence and mothballs are a health and label problem in an enclosed space. Spend the money on copper mesh.

Ants at the campground hookup

The water hose and the power cord are the two highways into an RV, and ants use both. When a rig parks for a week, the hose lying across the ground becomes a bridge. Barriers at the contact points do most of the work: keep the hose off the ground where possible, wipe the cord and hose at the entry, and use a labeled barrier product at the point where the cord enters the rig rather than spraying the campground. Inside, bait stations placed where pets and children cannot reach handle a trailing problem better than contact spray, which scatters the trail.

Spiders, wasps, and the furnace vent

Spiders in exterior compartments and around the LP tank are a nuisance, and a vacuum and a web brush handle most of it. The safety-critical one is wasps. Paper wasps and mud daubers nest in vents, in the furnace intake and exhaust, in the water heater compartment, and under the LP cover. A mud dauber plugging a furnace vent is a carbon monoxide risk, and that is not a pest nuisance — it is a life-safety issue. Screen every vent opening with fine mesh, inspect the vents at the start and end of each season, and never run the furnace without confirming the exhaust and intake are clear.

Small exposed wasp nests can be handled carefully with a labeled product at dusk when the insects are on the nest, following the label exactly. Nests inside a compartment or in a location that requires reaching into an enclosed space are worth a professional call at $125–$300.

2026 pricing anchors

The storage lot is not yours to treat

If the rig winters in a storage lot, the lot is not your property, and broadcasting rodenticide or spray around your space is both a legal and a neighbor problem. You seal the unit. You do not treat the lot. If the lot has a rodent problem, that is a conversation with the lot owner, and their provider handles the grounds. Focus your effort on the shell of the vehicle, the openings, and the food inside it.

Spring opening checklist

Before the first trip, check the trap lines and the compartment corners, look for chew marks on wiring and on the furnace and water heater lines, confirm all vent screens are intact, vacuum the cabinets and wipe them down, and inspect the mattress and cushions for nesting material. Then confirm the propane system and the furnace, and run the water system. A mouse that chews a wire near the converter can cost far more than the prevention did.