A trailer in the style of a Bowlus would be a good choice for stitch-and-glue, though it will still need internal frames. I've doen a preliminary set of plans for a replica Bowlus Papoose like this:

And while it's not exactly stitch-and-glue, here is the test model made from joining strakes cut from the CAD drawing of the body:


That's the official hold-and-sticky-tape build method.