None that I know of, but there can be a trailer towing issue with a camper that extends beyond the end of the bed. Many people use an extension bar. That's ok if the trailer is light weight. With a heavy trailer though, aside from the fact the bar may not be strong enough to carry the weight, when the truck turns the trailer has a more leverage pushing the rear of the truck around. If the trailer is heavy the solution is to lengthen the trailer tongue enough to clear the camper. Putting a heavy trailer on an extension bar is asking for trouble - makes backing up more difficult too.
