Here's the blog of a fellow who does quite a bit of trike touring, home based in Denmark:

Trikes and (odd) bikes.

You can see that these bikes, with the addition of a front rack and panniers, could carry 'round the world cycle touring dunnage.



Trikes of the other basic pattern can of course fit standard rear racks & panniers, plus the largest handlebar bag imaginable.

There are a great many other trike designs (1, 2) that would probably be more applicable to moving your place of residence across country rather than just touring!