Numero Uno Gato solution
Bring a couple cats with you. You will never see a mouse or sign of a mouse. When RV is not being used, leave a cat bed or two in the RV or anything else they sleep on for that matter.
We have always had least two cats RVing with us since 1993. We've never had any kind of vermin problem. That includes months long outdoor storage. Just the scent is enough to keep them away.
Ken
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