I don't flat that often, maybe once or twice a year, and rarely fix it on the road anyway, but I would find it very very stressful to ride worrying about flatting because I couldn't fix it myself.
The hard part about fixing a rear flat is imagining how the chain and rear derailleur are supposed to go together once the wheel is off, because the rear derailleur collapses a bit in on itself once you pull the wheel off.
Having a simple diagram of what it looks like once the wheel is ON with you would help. You could put it in your seat bag, or tape it under your saddle. I'll make you one if you like :-)
Winter riding is much less about badassery and much more about bundle-uppery. - malkin
1995 Kona Cinder Cone commuterFrankenbike/Selle Italia SLR Lady Gel Flow
2008 white Nakamura Summit Custom mtb/Terry Falcon X
2000 Schwinn Fastback Comp road bike/Specialized Jett