I posed the same question to my Ram dealer...here is what his research came back as saying...
"The answer for the camper question...even though the "plow prep group" only adds the alternator and skid plate shield by name, they actually engineer the front suspension with that package to support an increased weight of a snow plow. So, if you put a camper in, the engineers say that the truck will be unbalanced. It could still be done on this truck, at buyer discretion. So, we probably would want to get you a truck without the plow prep group."
Not saying I agree...just what was reported.