In between the Comlara and Farmdale events, there is a large wine festival being held at Matthiessen State Park immediately next to the new mountain bike trails there (as in immediately adjacent). This is a large festival with 27 wineries, food, and several bands. Might be a nice way to check out the trails for their upcoming race in October also (http://www.bikeiv.org/14601.html). It's got quite a diverse crowd, from black turtleneckers to Harley bikers. More information on it is at:
http://www.vintageillinois.com/

If you come, I'll be working for Prairie State Winery, but watching all the kids (Gawd forbid I'd be put in a serving position), but will be around to have a glass.