My F250 with the high capacity tow package has a payload of 2,637, now granted it is a platinum FX4 with sunroof so it is probably worst case but you can see these trucks do not have much space for pin weight especially once you put people in the truck and stuff in the camper. My 5th wheel has a pin weight of 1,300 (empty) and with a loaded truck we are probably sitting less than 200 free lbs left.