That's the idea behind Andersen Hitches' gooseneck adaptor. It basically attaches on a gooseneck ball in the truck bed, raises it to 5th wheel height, and clamps an included adaptor block onto the ...
You're probably used to seeing tow hitches attached to pickup trucks and SUVs. These devices connect to the vehicle's rear end and allow the driver to attach things like trailers or mini campers.
Viewer Melissa recently reached out to KGW with a question about Oregon's rules for towing trailers behind pickup trucks ... with a removable hitch in, when not towing — ball hitch, drop ...