We just purchased a 5th wheel (Montana) a neighbor used at job sites. It has set for the last few years at his home before selling it to us. He said he had problems with mice in the past and started putting moth balls throughout the camper because it was suppose to deter them. Now that we have it, I'm cleaning thoroughly and wonder if I should leave the moth balls in it. I don't particularly like that smell. We will not be retiring for another couple of years, so it will sit more than it will be used for a while. Any opinions out there?