Look very close inside the bottom of the camper in the very area of where it overhangs off the bed of the truck. Much weight of the camper rests on there and that is where you can find trouble from years of condesation and general culmination of aging with this camper. Anytime you see it not resting even in the truck bed is a concern, just make sure there's no cronic rot and does not smell moldy, terribly musty nor like old moisture smell in there. A very bright flashlight and getting in there and look is very important. This area can be repaired but if any rot to the plywood or the main camper base beams makes it more difficult. I will say these older Bigfoots are a better rig than newer and worth the effort.
