The YP/SMB/HSB/RES/WE combination works well. FHM will nibble, but the mouth is so small, it's more of a light tickle you barely notice. SMB will control larger crawfish, and RES will go after the juvenile craws/snails/leeches. 20 or so CC will not stir up the bottom, and can help keep things cleaner.
What part of Illinois are you in, Jason?