I’ll be there, but I’m also a first timer and a lowly Cat 4. I’m only doing the Dennis Jurs and Joliet races, not the full omnium due to family obligations.
Only thing I can say is that you should really pay attention to traffic. I used to live up there, and my wife is from the Naperville area. Traffic can be a bear, and if you leave at the wrong time, it can end poorly and the races are all over the area.