A bit late here I realize, but do a trial tour if you haven't already. Pick a weekend to try it out close to home; that way if everything fails you can always have a friend come get you.

One thing that's very important on any tour is to have some sort of backup plan. It doesn't have to be complex, just something, so you can have fun and not be worried about anything. I did a three-week tour of southern Ontario last year, staying only at hostels (unprepared to camp), on my old Specialized Globe. I carried my cell phone as well as phone numbers for all my friends (on paper, just in case) and regional taxi companies for emergencies. If it ever became necessary I have a few friends who would have driven up from Boston if absolutely necessary. Of course I never needed any help.

Bottom line is, have a basic contingency plan. You shouldn't need it but that way you can enjoy the tour and not be worried.