I haven't hunted around that area for about 3 decades. However, I do seem to remember that DNR got a former duck club across the river from Liverpool. Does Clear Lake strike a chord with anyone? Of course, Emiquon is just down the road and it's run by The Nature Conservancy...call Dickson Mounds and they will probably be able to put you in touch with them.
If you can't find anything out, try calling the CPO or wildlife biologist for Fulton County. I believe the wildlife biologist is either in Havana or Galesburg. The CPO, just contact the county sheriff and tell them you want to talk to the CPO...don't call 911...since they wouldn't consider this an emergency, they might come after you. As the CPO isn't on duty 24/7, it may take some time for him to get back to you.
Semper Fi, Marines
Casey 1997-2011 RIP