I personally would opt for the Xtracycle (Whoops, I already did, like one of the posters above, I have and commute on an Xtracycle.). If you can install it with no issues, you should be able to disassemble it for shipping.

I think that an Xtra would be an ideal touring rig, especially for backcountry bikepacking.
I occasionally use a Burley flat bed trailer with my Xtracycle.