We had another mouse problem in the '02 Classic. It wasn't as bad as our other mouse invasions - but any mouse problem is not good. The trailer was parked in my shed with the rear end low. I had put more dirt in the shed to avoid muddy areas. I think the smallish dirt berm at the rear of the shed and the trailer parked as it was, made it possible for mice to get on the rear frame. Now that it's in my shop I removed the rear bumper drawer to inspect. I found the droppings and disgusting trails mice leave in that compartment and on the drawer slides. I screwed galvanized hardware cloth over the 2 holes in that area. But then my drawer wouldn't close! After inspecting I found that the drawer slides, which are just o/h garage door rails, go into the 2 holes I covered!! It only lacked 4.5" of closing. I took the hacksaw and cut off 4.75" of the rail and everything closes as it should now. I hope this is the final place where mice entering. But, we all know as persistent as they are, you've got to keep watching.