Yes sir. My wife and I started going in the 90's. It started in Sullivan, IL then moved to Teutopolis, IL where I met the designer of Dixie Gunworks Tennessee Mountain Rifle, now the show is back where it started in Sullivan, IL.
The show typically pulls vendors from surrounding states and sometimes a little farther. Michael Eder from Flintlocks LLC and gunsmith Clarence Funneman previously from Funneman Frontier Arms now with Accuracy Firearms in Effingham, IL are both almost always set up with multiple tables.
My friend and I set up at the last show in Teutopolis (T-town), he sold his Uncle's Civil War estate items and I sold some random extras from tinkering in my shop. Over the years I have purchased an underhammer action, GM fast & slow twist barrels and a Davis early Germanic flintlock. Plus, small stuff like a leather possible bag, flints, furs, beeswax and leather sewing tools. My wife and I may reserve a couple tables and set up this year. If nothing else it is well worth the hour drive for us to go take a look see at what's for sale.
Give Steve Wood a call if you have an questions.