I have a 2003 F250 Crew cab 4x4
I have a hardside Lance camper that is 9'6"
According to the owners manual, you will be overloaded no matter what camper you run.
I also towed a car trailer loaded with an off roader toyota.
I put some airbags on the rear leafs, went to rancho addjustable shocks, and run a trans temp, boost, and EGT gages
A dually would be better for towing this set up, but like you, I didn't want one either.
Check out this site for a well of info
RV.Net Open Roads Forum: Truck Campers