Hmmmn not sure exactly what you are describing..."you put a camper on your truck and then a boat behind that." ...inferring that would be dangerous. Well, that is one vehicle towing one boat - not particulary dangerous. Just to be clear...as I have heard this misinformation before when people refer to a rv trailer as a camper. Here in the NW the general consensus is that a rv trailer that you tow is a "trailer". Camper on the other hand is something you haul or place in the bed of a pick-up truck. The choice of a camper allows for the option to tow something, like a boat, etc.  Simplified...a "trailer", rv or any kind is something you tow...that trails behind the vehicle. A "rv camper" is something that is placed ON the vehicle, usually the bed of a pick up truck and is not something that is or can be towed. Not sure why some call trailers campers but they do....maybe thinking any structure you can camp in is a camper...whether it is on the vehicle or behind it.