You have to unhook to back up more than about 10'. In Idaho I see people towing boats behind their campers all the time. We towed quads on a flat trailer behind our last 5th wheel and had no problems what so ever. One of the main reasons we bought our 330RLTS was so we could haul quads on the truck bed and eliminate the extra trailer.
2011 Eagle 330RLTS with just about every option.
Dodge SRW 1 ton Cummins powered.
I was born with nothing and I still have most of it left.