On our first trip in 2010 with our new fifth wheel, we stayed at Baker's Hole FS CG near Yellowstone. Twice we were awakened by a chipmunk in our kitchen, or at least it sounded like that. We checked the underbelly and found a mushroom shoved up under an area in the slide. We took it out and on to the next CG. When we got home, we crawled under the fifth wheel and using foam, plugged all the areas we could see they could get in and put wire mesh behind the vent under the fridge. No other problems since and we went back to the same CG later. Fast forward five years to this past February when we took our unit in to get a complete solar system installed. Behind the storage wall and up in the wiring harness the shop guys found enough mushrooms to fill a plastic grocery bag! Luckily no wiring had been chewed at all. The shop inspected everything for us. The shop guys were teasing us and wondering what other stuff we were smuggling besides the magic mushrooms!