Wow, thanks for all the great info!
We currently have a Campinn 560 Raindrop. The mountain bikes ride on a Yakima tray type hitch mount rack called a Holdup. It weighs about 50# itself, heavy.
I've got it mounted between the TV and the trailer on a Rube Goldberged ball mount that works...pretty well. In a tight turn, near jackknife, the bike tires
can touch the trailer. I don't like that. And the trailer is backed waaaaay back from the tow vehicle. We tow with big Dodge Durango and had no problems at all on our recent run from NW Jersey to Fort Lauderdale and back again, but I'd just like a better hitch set up. Might get something fabricated.
Or I might put a receiver on the back of the Raindrop for the bike rack.
And I'd like to be able to do the same with Fiberglass unit too.
That stuff from Orbital Machine Works looks like just the ticket.
All I've got to do is find a 17' Casita
that I can afford.