Hey medic,
That's a great area where you live. I would love to get to the Mulberry one day!
There's the Flint River below Albany, Georgia, has good material. But keep in mind that "flint"
is a very generic term for knapping materials and what you are really looking for in your
area is chert, rhyolite, quartzite, etc. Very little true flint.
You might want to do a little research and see where the material the prehistoric indians used
in your area came from.
Also, check out your landscaping rock dealers in the area. Lots of time they will have things like
Tennessee Fieldstone, which is often times good knappable chert for sale by the ton and 50 lbs
might cost you $5.00.
Good Luck, Joe