Actually, Eric (WildOne), I wasn't expecting answers; I just thought I'd provide some questions as requested in the thread title. :)
But since you did answer...some comments on your answers--
They DID come up with six flags for Darien Lake, specifically the flags of England, the United States, State of New York, Genessee County, Iriquois Nation, and Six Flags Theme Parks. I don't know if they ever found any for the other parks, though I suppose for Geauga Lake they could use United States, Ohio, Connecticut, City of Aurora, Bainbridge Township, and Geauga County.
The Premier/Six Flags deal had to be no later than early 1998 because that was the year of the Kentucky Kingdom conversion.
When I did a count of Six Flags wood coasters, I came up with a total of 27, but I didn't count the one at La Ronde. I think I remembered to count Frontier City, and I know I counted The Great Escape and Wyandot Lake.
--Dave Althoff, Jr.