I have almost the identical truck. Long Horn, but all else the same. I am considering purchasing a bigger travel trailer. Looking at a 31’ overall (I believe it is about 27-28’ box, plus tongue and bumper). UVW is 6500lbs and tongue weight is 640lbs. I never tow with my tanks full. I figure I’d probably add about 750lbs cargo, 1000max. The GVWR is 8800lbs. I have no doubt it will tow fine on the flats, but how does it do over hills/mountains? Have you taken your rig long distances? I will be using a WD hitch for sure. How was the stability/sway? I just figured my truck occupant, cargo, dogs and hitch leaving me about 850lbs for any additional cargo/trailer tongue. I recently gad a 2009 RAM, with the smaller 4.7L and a 3.21 rear end. It struggled to pull my 20ft trailer up over mountain passes. So, going from that to my 5.7L w/3.92 rear will be life changing, I’m sure.... but, with a larger trailer?