I think more of a "pop-up" set up would work with softer sides more like a tent. The pop up could provide less wind resistance while towing. Still has to be built with lightness in mind! Kinda looks like towing around a tube or plastic type pipe set up to be a camper, but what do I know...
...my friend had the idea of towing a small flat trailer with fold out sides to form a base so your up off the ground and the a tent on top of that like was said here.
But still has to be built with lightness in mind! Kinda looks like towing around a tube or plastic type pipe set up to be a camper, but what do I know!
I used to do a lot of big wall climbing in my younger days - I would imagine one of those portaledge tents could be relatively easily modified into a trailer tent, if you are that way inclined, They are pretty rigid. I bet it could be made to come in a lot lower than 68lb of the Kamp-right bushtrekka - that's alot of weight for tent and trailer alone.
Personally I prefer the minimalist approach of a bivvi tent and inflatable sleeping mat / pillow.