Rob,
I posted this same question on a couple other ST3 boards and so far here is what I have:
7mm & 8mm sockets
small flat-head screwdriver
small phillips screwdriver
and various small allen-head wrenches
I plan to just take sockets from 6mm to 13mm and allen T-wrenches from 4mm to 10mm. Might take a pair of needle nose and regular pliers as well. And a small towel to sit things on.
Neanderthal