Here's my story, though I'm not saying it's right or wrong. We bought a 2004 2500 QC 4x4 with a payload of just over 2000 lbs. We later bought a fifth wheel with a pin weight of over 1800 lbs. Add: fuel (37 gallons + 20 extra = almost 400 lbs), me, wife & kids (375 lbs), firewood, bikes, tool...