Another possibility, which might be better to consider for someone not already having a 5th wheel hitch, is to get under the bed mounted rails, which are used with Reese Signature and Elite Hitches. That's what I have now for my 5th wheel, and plan to keep installed in my truck I when I get a new NL camper this spring.
Also, since the under the bed mounted rails do not portrude above the truck bed, and no blocking is needed to protect them, this will give your camper a lower center of gravity, which might be beneficial in some cases.
