I've seen those trailers around on farms but never hitched up to one. I can only imagine it'd be a bitch to back them up. I saw a older guy at a boat ramp once that had a reciever and hitch on the front of his pickup. it looked really wierd to see him unloading but he said it made it easy as pie. That's prolly what I'd do if I had to move one of those contraptions around.

I gotta ask, what's the advantage? Square turns? Tumped over trailers?
BKb