We haul a '90' Shadow Cruiser, weighs right at listed capacity, loaded with us and three dogs, of 3300# on our '04' Chevy 3500 Duramax Crew Cab long bed 4x4 dually. We just completed a 4,000 mile jaunt thru the southeast and averaged 15.1 mpg. Our son in law welded up some extension brackets from super heavy I-beam since our old camper won't accept the newer corner mounted brackets. We simply remove them after loading and lay the jacks on the floor of the back seat in case we need to remove the camper for some reason while traveling. Not super handy but works fine for us.
