Yukon, Suburban, Tahoe in front of a Shadow Cruiser 225 RBS

32' tongue to tail....the Denali that Heisenberg liked to would definitely handle 6000 lbs in comfort assuming you didn't fill all 3 rows with passengers....the 2500 Burb (or Yukon XL) would give you a stiffer suspension and better overall control without making the ride too stiff.