I will not be much help but I will tell you what I did. I haven't towed yet and the camper, I got a Chaparral and they say it made for short beds but I went ahead and got a slider for my shortbed truck. It was a couple hundred more and I live by the say "its better to have and not need then to need and not have. Maybe having the slide will allow me to get into a tighter spot then if I didn't.
TV: 2013 Ram 2500 Laramie, G56, Andersen Ultimate 5th Wheel Hitch.
5er: 2013 Coachmen Chaparral 280RLS