Matt,
You won't be able to smother fescue, or most any CSG for that matter. Believe me, I've tried. The established plant always beats out the seed. Fescue also has allelopathic qualities that prohibit competition as well.
Also not a fan of herbicide.. Being slightly north of you (central MO) I was fortunate enough that a bottom plow cleaned it up easily, but my better soils allowed it.
FWIW, Gly does a pretty poor job on fescue. You have to drop a bomb on it, heavy dose.. Second dose is almost always required. In your situation, if you're open to other herbicides - I'd just use Clethodim. Being a selective herbicide, it will target the grasses only. You'll need to wait when the CSG are actively growing, but before the WSG are growing if you just want to eliminate the Brome, Fescue, etc. Wait until it's slightly warmer for the Clethodim to have a greater effect, it doesn't work as well in the cold. Mid to late April may be good timing for you.
Lastly, if you don't have a means to spray, you could call your local MFA or Ag Services to see if they'll spray for you.