I have fished with Nightcrawlers, Stinkbaits, Valveeta Cheese and Chicken Livers for cats. Nightcrawlers and Chicken Livers will probably be your best bet. THough if you are fishing in waters overpopulated by Bluegills your worm will probably be eating off before it hits the ground. I stick with Chicken Livers. Its a tried and true bait and you wont have to worry about anything other than Bullheads and a Snapping Turtle (caught 6 so far this year by accident) getting ahold of it. People use doughballs for cats too but you will probably catch Carp with those. There are SO MANY baits out there. you could also experiment with Beef Liver, Beef Brains, Pork Kidney, Chicken Hearts, etc. Let me know how you did
Chkn livers work great but are messy, don't stay on very well and make your hands and everything you touch smell like sht. Cut bait (fresh bluegills or large chubs)work equally well if not better in my opinion. Not familiar with the Dupage but they have worked in every river I've fished. I have fished with other guys that use cheap hotdogs and was surprised how well they work!
If you are thinking of eating them, the water is much, much cleaner on the Kank.
Years back a friend and I were fishing below the sewage plant late one night in January. We were casting jerkbaits above a hole fishing maybe ten feet away from each other. I see him set the hook followed by a nice bend on his rod, seconds later he hoists his catch on the bank. I turned on my headlight and the trophy was revealed, a bloated spent tampon barely hooked by the string. Since we had no stringer I offered to carry it back to the truck so he could take it in and get his picture taken. He opted for a quick release.
You're probably right though Ron, I'd bet it's cleaner than most.