Gat
The GAT joined forces with the Viking 9-ball tour. I believe that there was an article on AZ about this joint venture. If not, check out the Maxim Billiards Magazine online. I know that the GAT had a stop in Centralia as well as several locations around St. Louis.
In the tournaments section of the forum there are typically good leads on tournaments in the Midwest. Without a doubt you will have to drive several hours for good events. I use to live in Marion, IL and currently live in Milwaukee. I relocate to St. Louis in two weeks. I will be playing in Cahokia at Break Billiards for the Midwest 9-ball Tour event.
I played in the last Brickyard Classic event in Indy. It was fun. There was a fair amount of variation from table to table though as far as rails and table speed on the Valley tables used for the tournament.
Also, there are tourneys down in Cape Girardeau which is probably a slightly further drive than St. Louis for you. I would say between AZ Billiards forums, Inside English, and Maxim, you will be up on all the major events.
I am really sad to see that the periodical "Ball In Hand" that used to circulate in St. Louis went under. Back in the late 90's, this was a publication that would list all of the local places to play, tournament announcements, tournament results with pictures, equipment vendors, columns, editorials, etc. It was GREAT. However, due to lack of funding and cost the person running it stopped the operation. When that was in circulation though, STL was pulling local tournaments at any level that would be over 128 players consistently. It sounds like now the tourneys are lucky to draw 60 to 70 players.
Patrick