Bring lawyers guns and money.... :)
Seriously though, would bring tubes (2) tire irons, if you have the stock bike tool kit you should be able to deal with most issues, but maybe a ratchet and a few common sockets, one of those painfully bright Cobb led light sticks, spendy but SO worth it on a dark night. Put on a fresh fuel filter, bring and least 2 tanks worth of oil, and I would go with a larger gas can. At least one new plug, pre-gapped, if you have room a spare tire. Check your insurance, I just found out that mine offers towing! :) Who knew? Phone charger and also one of those batteries that can charge your phone. Rain gear, for the Record Hobbits hate down pours so you might have some issues there, but at least have one of those disposable rain poncho things, a few band-aids never hurt. Gloves. Don't laugh, but TP.