I am trying to configure my (yet to be purchased) rig.
Long bed 4x4 Dodge dually and Host Mammoth.
Looking at extended Hitch bars from etrailer, there is a 3 footer that I like. My question is this: is it long enough? The camper sticks out over 3 feet (11.5 ft camper in an 8 ft bed) and I would hate to buy the hitch bar and find it too short.
I have more of my Mammoth on the bed than a pickup and can get away with a 36" model. I went with a 42" so I had sufficient room to slide open the tray while hitched. A pickup will need a 42" or 48" SuperTruss.
I highly doubt 36" is enough. With my 11' camper on my Chevy dually a 48" Super Truss is barely long enough. My ball is only about 6" beyond my camper bumper.
Put the camper on and grab tape measure. The hitch doesn't end with the bed, but sticks farther under the bumper. Depends on the truck that can add 8" Than measure trailer tongue. Some trailers will be ok with ball under the camper, some will crash on turns. Make a jig imitating the tongue with corner of the trailer and turn it around on the point where proposed hitch might go. You have to balance between making set danger to drive and set that will crash on turns, so you don't have margin for error.
I have an Everest and bought a 48" Reese extension. I later cut it back to 42". With the 2" receiver and ball you gain about 5 more inches. I doubt that 36" will be long enough to insure than you can make sharp turns.The length I have works great.