MICE!!!

Used 2 suggestions that worked very well for me, both are easy. First is the plug in device that has 3 levels, below the threshold of human hearing, above human hearing, and whole barn noise level. The other is the plastic 5 gallon bucket with a plastic plate attached to the top by a straight piece of metal coat hanger. Put the holes in the plastic plate so one edge of the plate rests on one edge of the rim. Put peanut butter on the top side of the plate away from the edge resting on the bucket. Attach something on the side resting on the bucket that just balances the plate in a flat plane. Fill the bucket about 1/2 full of water. Set the bucket outside the RV, run a piece of wood as a ramp. Check every couple days. Dump the water with the dead mice and refresh the teaspoon of peanut butter every couple of weeks.

This works well where the RV is stored without electricity available. Do a search for "worlds best mouse trap". Put one out last year and had 6 overnight.