Frankly I would want the battery outside the camper. They sometimes leak acid and the fumes under some conditions can explode. Thats why they are outside on the hitch in the open air. Some campers have a side access panel door with vents that opens to the outside and the battery is in it. Before you get all upset at what I said, I was a Air Craft Electrician in the USAF and we learned the Right way to maintain batteries.