Mine goes in a little briefcase with my HP Mini laptop, and a Healtech Diagnostic computer for my Suzuki race bike. Also have a series of thumb drives with repair manuals for all the various bikes we handle. All of it lives in the race trailer when traveling, and in the shop when we are at home.
I don't currently own a road bike that is GS-911-compatible, so I no longer travel with it. When I did have an R1100S, it went into the saddlebag with the Mini and cables. I used it twice on the road for my own bike, successful diagnosis/repair both times. I've used it a dozen times for other riders, and have saved a few vacations with it.