We also have the 3711FL most of the storage is over or aft of the axles with every little in the living room over the pin. I brought mine to the scales with loaded for a weekend camping trip and here is a link to the numbers
http://www.towingplanner.com/ActualW...&w2da=3480&a=2
The only numbers that was close is the GVWR of 11,340 lbs and my truck has GVWR of 11,500.