Find the nearest SASS/NCOWs club. I believe Illinois has a fair number of SASS clubs, you can go to SASSwire.com and find them.
Call the club officer/Territorial Govenor. Tell him what you want to do, ask if it would be all right to demonstrate and shoot your GAF weapons with them. I've yet to have one tell me no. Go and Shoot, take some flyers with you. Most every SASS/NCOWs member is a gun wonk, and love to see different things on the line. Have fun with it. Tell them your practicing for the State/Department/Grand Muster. Describe these when they ask.
Get in Touch with your fellow GAF members in IL. Get an e-mail ring going, have dinner together sometime, set up a sharpshooter match. Get together to shoot the Postal course.