I would creep slowly under a questionable overpass and If I touched it would only be the AC. Not going to fly under at 40 or 50MPH and hope for the best. Although it is funny to imagine. When I pick up the camper I will measure while on the truck. Will also hit the truck scales to get total weight.
Original question is what JoelC answered. But I will be careful and plan my routes. There is right now just one questionable bridge in Unionpoint GA that I can detour around. Other than that we are open highway. But do plan to go to some areas I will research first.
Thanks for the responses.