To keep rodents out of your rv place Bounce fabric softener sheet, regular or original only, in all bays, draws and spaces that you can reach. Keeps the mice away from your rv.
Simply pull and replace the Bounce sheets every 3 or 4 months.
Putting your rv in storage? Add powered rodent beepers for even more protection.
Don't forget to plug all holes entering the bottom of your coach with steel wool. Mice hate steel wool and won't chew through it.
Never place moth balls in or around the perimeter of your rv. The gases given off are not good for humans, leave a lingering smell that's hard to get rid of and moth balls kill lot of animals... including your pets.
Be sure to take extra steps to keep whatever type of rv you have mouse free; rodent damage can be extensive and very costly to repair.
Keep on goin down the road... without mice!