Another thing to think about is the more trailer you have behind the rear axle, the more opportunity you have to drag if pulling out of the highway up an incline. I pulled a 38' fifth wheel for several years and while we could usually find sites if we planned far enough ahead, there are not nearly as many options as for smaller trailers here on the east coast. Our current 31' rig is a dream to maneuver compared to that big one, and hopefully we will not drag off the spare tire anymore. Only you know the kind of roads you travel and kind of campgrounds you want to go to.
