I've been on the road 5 months straight.
What I have used:
soldering iron, solder, cable ends, electrical tape, crimper
electric drill, bits, hole saw, charger
pliers, adjustable wrenches (need two), screwdrivers
special wrenches for particular items (2)
compressor (little one for bike tires)
teflon tape (for plumbing)
jack and handle
shop manuals ($16 on ebay!)
tire gauge
pocket knife (I use it many times per day)
file
3 in 1 oil
tape measure
level
spare bolts and screws and such
I don't carry wrenches in every size or a lot of sockets. Adjustable wrenches, pliers, and vice grips are more flexible.