I parked my trailer for about three weeks in the normal spot I use for storage. I go to move it last week because I was heading out on a 5 day grouse hunting trip. I discover no turn signals, brake lights and all but two of my running lights did not work. Also found that I had now power to any of my bathroom lights or power vent and kitchen light. Turns out that a red squirrel decided that my bathroom cabinet was a great place to build a nest for the winter. It chewed a huge hole in the inner wall to get there. Used the lower cabinet area (where the slide controller is to store food) and chew a whole lot of wires). Took me 3 hours to fix the problems, but I still don't have power to the one of the kitchen lights (I can see the chewed wire behind the wall, I just can't reach it without removing the wall panel).
I managed to capture it two days later with a live trap and released it far away from my rig.