We stored our old fifth-wheel in a barn. First year, we got mice after using just the Bounce dryer sheet treatment. Last year, we used the dryer sheets, cotton balls soaked in peppermint oil and something called Cab Fresh (or maybe it's Fresh Cab), which is some sort of natural rodent repellent that we get at our local Fleet Farm store. When we picked up the trailer out of storage this spring, we found virtually no evidence of mouse presence. So we'll use all three of those things again this winter. There's no kill like overkill when it comes to keeping mice out of the trailer, I say.
Dennis and Kathy
And Aggie the Gordon setter
2015 Columbus 320RS
2016 Ram 3500 diesel
Employment was great, but retirement is better