As sure as the sun comes up each morning, there will always be a thread, on every RV forum, on how to keep mice out of the RV. For the first time in years, we have zero rodent sign in our RV, and after a particularly tough winter (which is, as I type, giving us yet another kick in the pants). We live out "in the middle of no-where", surrounded by marsh land and woods; there's no shortage of critters looking for a warm place to spend the winter.
Dryer sheets did not work. I've posted previously how they actually made a nest out of one. Traps are impractical, unless I want to trudge through the snow a couple times each day to check the traps. Mothballs work, but it takes half the season to get rid of the smell. I won't use poisons, I'm too concerned about our dogs, and where the little beasts will choose to die, and rot.
I used a three pronged attack. All suggestions I found here, or on other forums. One, in every 'basement' compartment I did use moth balls. I put a few each in a dozen thigh high nylon 'footies' and spread those around in the storage and equipment bays. In the smaller interior areas and cabinets I soaked cotton balls in peppermint oil, placed those in small open plastic containers. Under the bed, in the closet, under the kitchen sink, in the pantry cabinets, laundry closet and dinning room cabinet/computer workstation, as well as under the living room sofas, I placed "Fresh Cab" Fresh Cab 12 Pack Standard Web Package
Unlike moth balls, this stuff has a very pleasant smell. It was supposedly developed to help keep mice and rats out of farm equipment and trucks stored for long periods of time.
I've checked every storage and equipment bay, every drawer, closet and under all the furniture, I haven't found a single sign of any critter visits.