So, I got myself just enough Really Useful Boxes, of various sizes and colors, to pack up Small World in such a way that you can "just pass the race tokens over" to the person who chooses that race; should speed up the game, or at least cleanup.
All in all, my Small World storage now consists of about 40 Really Useful Boxes, including the 17-liter giant box holding everything, including the original box.
I could post some pictures, but they really won't do it justice.
But for reference, this is how big the 17L box is:
External: 18 7⁄8" x 15 3⁄8" x 8"
Whereas the original game box is more like 12 x 12 x 4
It's comically huge, but still very much portable in a single coherent unit.
Galactica has a bunch of smaller R.U.B.s now, too, but everything for that still fits inside the Exodus box.