5th Wheel Hitch - Underbed Mount or Not?

CarnationSailor wrote:
We just traded our travel trailer for a 5th wheel and need to get a hitch for our new 2015 Silverado 2500HD Duramax. I am leaning toward the Demco Hijacker (autoslide) hitch, but can't decide whether to go with the under bed mount model or the above bed model.

I don't plan on using the truck for much other than towing the 5th wheel so I have no real need for a "clean" bed for cargo hauling. However, why wouldn't I want the flexibility of having a clean bed in case my needs change?

I guess I'm asking, "What is the downside of going with an under bed mount?

Also, any pros or cons regarding the Hijacker are welcome.

The first time you need that clean bed, you'll kick yourself. ;-) In my case, I absolutely need a clean bed =and= I have a gooseneck trailer, to the B&W Turnover Ball and Companion were the way to go. I use the GN more than the FW...dammit. :-(

Lyle