Got passed on the Capital Beltway (I495 around Washington) in Friday afternoon's crush hour by one of these. Pulled by a Land Rover and headed up I-270. http://www.bushmantrailers.com/index.html
They are nice, a bit pricey tho. Check out jeepsunlimited.com in the forum for trailers they have a links thread on all those adventure type trailers. I keep getting sidetracked on my tear build.. I'm now building a military type trailer, like the M416 but a foot longer, with a rack on top for a tent. That will help with everything else till the tear gets back underway(and still be a little tent like to keep the wife interested in me building a tear).
Later,
Steve C