One year at VSC some one had a Barnstormer ( I think it was) that came completely apart and fit into what looked like a large brief case. It was a work of art! I think it was sized so that it could be carried on board an airliner, but not sure that would work out these days. Some one out there may remember who that was and will have photos but I know I wasn't able to take any of it at the time.
A model like that with removable wing panels, and a removable stab would make for a quite small package. The one I described above was all held together with 4-40 socket head cap screws and required one tool to assemble and take apart. removing the engine for transport is optional and may help out.
Good luck and have fun,
Dan McEntee