Breaking a bit from market reports, here are a couple of websites that list the haunted houses in the area. These are rated and more info is available at these sites:

http://www.haunted-houses-chicago.com/ - Lists by city
http://www.hauntedhousechicago.com/ - Reviews, coupons, maps and all the S C A R I E S T haunted houses
http://costumeideazone.com/ - Costume Ideas



Have fun!