colliehauler, the answer is "none, so far." But I fear it is only a matter of time. We tow on very rough forest roads, with huge rocks, mud, sand, snow, ice, etc. And we have to go very slowly on the really bad roads -- five miles an hour, sometimes.
I have done everything I can to up-armor my beloved little trailer -- heavy axle, leaf springs, shocks, beefy tires, extra clearance, etc. But it is just not designed for the way I like to go camping.
I doubt I will spring for one of these new trailers just yet -- $50,000 is four times as much as what I paid for my current trailer -- but someday I may have to bite the bullet.
It's nice to have the option, anyway.
