I know that this is not in IL or WI but thought that I would post this in here as this is where the majority of people that I know look at. They have a points series race on Saturday March 14th. There is talk of running a slash class along with buggy and truggy. Hope that a few of the people that come on here might be able to make it out to this race as I saw quite a few of the LH crew @ Newberry's this last weekend.
Here is a link to their homepage: http://www.extremerconline.com/
Check out their message board for more details.