Although not in your Kane/DuPage description, I'd say the best overall lake in our general area for "Clops" is Shabbona. With that said, it is not an easy lake to learn. It takes some searching and the willingness to move, but when the bite is good, it can be impressive. Of course there is a mere 10 fish per day limit which is a double edged sword. When the bite is hot, you feel a little bummed at only 10 fish, but that same limit is what makes those 10 fish limits weigh up to 10#! I think last year the new record was set and it was just over 10# or, a 1# average. I've caught some nice ones but never quite got into the hogs that consistent. My best day ever is probably more like half that give or take.
The other good news is that there are plenty of other species that bite well throughout the winter as well if the crappie aren't cooperating. Last winter the Gilligan bite over the roadbed was really consistent. The walleye in that area can be good too if you can figure them out (I can't seem to).