I lived in Okmulgee for about a year in the 1980s. Never heard of Flamesville.
What's the scoop?
Supposedly it was some type of religious cult/compound. All kinds of third and fourth hand reports of kids seeing robed figures and being chased, etc.
We never could find it. I have to confess I was more interested in the blonde gals in the front seat of my Jeep, than in running into Okmulgee County's version of the Branch Davidians. But it made a good excuse to take them out into the woods.....