I just ordered a compact jumper cable set here:
http://www.sportsmansguide.com/net/cb/cb.aspx?a=36143. You could probably find something similar in your favorite auto parts store. A AAA RV policy is good insurance, and will pay for itself in one call.
JC Whitney sells small tire irons made for MC's. In my tool bag I keep a spare spark plug, spare headlight bulb (yes, fragile), gaffer tape (don't need the whole roll), and as mentioned, enough tools to take care of loose nuts/bolts, and remove the seat, side covers.
Yes, we take pre-caution for the unexpected, but most of the time we do spend up and running.
Ditto on the butt comments. I feel it in just an hour of highway riding, but hey, just pull over once in a while. Well, you'll be stopping to get fuel every couple of hours anyway. Don't forget to post a trip report.
Enjoy, and Have a great ride!