Hi Brian,
I too am new here and am wanting to start prospecting where I can. I'm in St. Clair county and not sure what if anything occurs here. I have a friend that owns property at the bottom of the bluffs about 8 to 10 miles from the Mississippi east of E. St. Louis. It has a creek on it that floods in heavy rain and moves pretty swiftly then, but is normally pretty shallow the rest of the time. I'm going to test out a sluice that I built myself, but don't expect to find anything.
Maybe we can get an outing organized this summer if we can get interest and a place to find gold. I look forward to meeting some good people and having some fun looking for gold in IL.