Hello, yes I pull a 37 ft Grand Design travel trailer.. Started with a 2500 Gm went to a 3500 GM just cause. I would recomend a weight Distrubtion Hitch with built in sway control. Only problem I have had was finding a spot for the long trailer a couple times. Get it set up right and you will be fine. Just don't try to pull the thing with too small a rig. Grand Design makes some very nice travel trailers, better than most, not sure but we are very happy with ours.Haven't pulled a 5th wheel as I use the bed space and have a canopy. My rig has around 1,500 lbs of tongue weight and I am using a Reese Straight Line with Dual Cam setup.