Try doing a google search for these:

Rodhouse Rut and Strut
Hadley Creek Outfitters
Golden Triangle Outfitters

I've heard good things about these. You could also try joining "Access Illinois", which is basically a network of private land owners who will lease their land to hunters. I personally prefer this way, I don't like the idea of having a guide and already having my stands hung. IMO, that's not hunting, just shooting.