Potential tune-up races:

4 weeks out, 09/27: There are a few possibilities, Coach Hathaway's Running South 10K seems to stand out. Unfortunately it's in Indianapolis, but otherwise it seems like a nice race.

2 weeks out, 10/11: Spotlight on Nursing 10K, Indianapolis (again).
It seems that the 10K is a serious event, so no winning of this one :) but it seems to be very well run.

Of course Indianapolis races are flat - another disadvantage - but not a huge deal.