The Rodent Guide
Any crumbs are an invitation for mice, and are one of the biggest attractants to your camper, so clean them up!
Before starting with any repellents or traps, you should closely examine your camper for any holes or entry points.
Keep your food in very tightly sealed boxes, and if you have a refrigerator in your camper, keep your food there.
A very clever hack that does a fantastic job preventing mice from entering your camper is using tubes made of thin metal sheets around your wheels.
Soak cotton balls with peppermint oil and leave them around your camper, especially where there are any cracks or gaps.
If you already have a mouse inside your camper, you will need to use a mouse trap to get rid of it.