All,It turns out not much. I'm looking at a 2009 Ram 3500 Cummins/6Speed Manual Crew Cab SLT 4x4 SRW with a GVWR of 10,100# and a curb weight of 6,644#. That leaves me with a whooping 3,465# for a camper.Try to find a hard side camper with a loaded w...