I'm not sure about folkstyle tournaments but freestyle and greco tournaments are plentiful.
Granite City has a Wed. night series that alternates between freestyle and greco. I know they passed out flyers at regionals this weekend and the dates have been set. There are also Saturday freestyle and greco tournements at a number of the local schools (last year there were a couple at Edwardsville, Belleville East, Belleville West) these should get posted in the next couple of weeks.
Wed nights are usually 5:00 weigh ins wrestle at 6:00 and everyone's out by 9:00
Saturday's are usually done by noon.