Ok, lets just say for chits and giggles I weigh..aaa..lets say 260. With the camper suported on the same structure as if it was in the bed of the truck not secured ,if there were 260lbs in the master ...
On a recent trip we had 50-60 mph. gusts one night, and we (mostly me)are over 400#.The wind was able to lift my bed mat and push it completely up against the cab of my 8' bed, at no time did I feel like we would tip over. Maybe putting your wallet on rear bumper will give you some peace of mind.:)