No special endorsement needed in MT. There is a local shop that specialized in trailers and they beef up the rear bumper, hitch, and wire it for the caboose trailer brakes (it's not needed with the boatmate's surge brakes) but my RZR trailer has electric brakes. They also flip axles and build shackles and I might have to have them do that since my truck is lifted just to get the clearance needed. But some newer 5th wheels come pretty high stock so we'll see!

It is alot to think about to buy, build, and get the right set-up done right! Just wondering how many other out there are (pardon the pun) "in the same boat"