I have a question for those advocating an automatic type sliding hitch. I ask this not to make a point, but because I REALLY want to know. It's the reason I considered, but elected not to put one in my last truck which was a short bed. I ask this now because it may be useful information for the OP's original question.
Question:
I understand the way a auto-slider works, but what happens if you have to hook up your camper at a 45 degree angle? If the hitch is forward in it's "normal" position, isn't there the danger of contact between the rear corner of the truck and the center of the camper? Is there a way to "over ride" the slider position while hooking up? When I had my short bed and a manual slider, there's no way I could have hooked up with the slide forward., and there were many times over the years where I had to do this because of short campsites, etc.
I have a long bed now, and love it for lots of reasons over a short bed, but have always wondered about this.