Raccoons are scavengers and will eat pretty much everything and anything (including dog/cat food, human garbage etc). I would suggest something a little stinkier (in addition to the peanut butter). I've heard in the past of using bacon grease/fat or lard and jam. I would make whatever you bait the trap with unappealing to your cats though. And be careful...i'm not sure what type of rabies program is down in your area.