I bought a hi-lift when I got my trooper, so many years ago. It didn't really work though because the bumpers on the trooper were too flimsy. As a result, my hi-lift is in several parts, scattered around my shed and/or my garage. But once summer comes, if I can find all the parts, I plan to mount it to my rear bumper in some fashion. I have the Mopar off road rear bumper, so it doesn't quite have the flat space on all surfaces that would be useful for the mounting - but I'll find a way to do it somehow. Right now I am thinking of mounting it on the underside of the bumper, but we'll see how it goes.
Update: looking at it, no, that will not work, due to the hitch. damn.