I was looking at the Travoy the other day and also wondered about using it for touring. Quite frankly, I don't quite "get" the design of it, and why one would prefer it over a BOB or Nomad.
For touring, I suppose you could pack all your stuff in a full-size backpack and strap it to the trailer. This would make it really easy to transport your gear off the bike/unload very quickly. Simply lock the trailer to the bike with a cable lock, unstrap the pack and throw it on your back, and off you go. Kind of a neat, multi-modal setup if you will (like containers on ships/trains)!
Personally, I think I'd prefer the lower center of gravity of a regular Burley Nomad or a BOB, and you could still do the same backpack thing. Or, use the Burley Flatbed instead of a Nomad.