I've only run about 2 times since December.......I SUCK!!!!!!!! I'm running the Bay To Breakers this week. Should be interesting. Next weekend I'm running a half in Fresno. Watch the news headlines........"Barefoot runner DFO's!" for sure.
I think you shouldn't run either of those events. Walk them if you want, but don't run them. Sorry, but I can't motivate you when I don't think it's safe. Were you planning to do these races barefoot?