Here, finally a picture showing how a bike fits onto the trailer. Just taking it home after some maintenance.
I'm thinking I'd like the trailer to be long enough to just load up a complete bike directly without removing the wheel. Not sure how I'd secure it, though, as I own bikes of many different wheel and hub sizes. Tires from 1-1/4" up to 4" wide, and front hubs from 100-135mm!