That rollup jobber that I have is pretty much the best thing I've found. Quiet, compact, organized, and easy as hell to transport wherever you need it. Every wrench from 1/4" to 1", every socket from 3/8" to 1", ratchet, extension, two screwdrivers, and an allen wrench set in something that takes up as much space as a foot-long sandwich.
edit:
I had a telescoping breaker bar with a ~4" extension built into it. Thing was about a foot long when collapsed and went out to two feet, and the extension was perfect for use as a lug wrench. That thing kicked ass and I'll be looking for another one when I assemble the toolkit for the next rig.
The rollup thing, that breaker bar, a hammer, lug nut socket, yoke socket (the 1-5/16" also serviced the pitman arm nut, and the 1-1/8" fit the tie rod castle nuts), spark plug socket w/universal drive, big adjustable wrench, a pipe wrench, vice grips, and a hub tool...that was enough to do 90% of all work on my rig. If I needed more than that, chances are whatever was wrong was beyond the scope of an immediate trailside repair anyway.