Sorry to make things worse but starting with your sticker payload, subtract first your family and pet load (the 800#), then subtract the weight of the fifth wheel hitch you choose (Andersen Ultimate is the lightest of these), next subtract any cargo that you may throw in the truck bed. Lastly, your 5er's hitch weight will increase by the weight of the battery (55#) and the propane tanks (30# x 2). So I think you are looking at (2450 - 800 - 55 - 60) 1535 for an advertised new 5er hitch weight. Reduce that a little more if the design has a front storage bin and you have some stuff you plan on hauling in there. A 3500 SRW long bed will solve your problem, otherwise look at ultra light bunk houses like Open Range Light bunk house that advertises a 1405 dry hitch weight
OpenRangeLight LF314BHS
