Heading up to NWI tonight for DLD and would like to hit a Binny's since IL gets a lot of stuff we don't get in Indiana.
Seeing that there will be a lot of self-selected beer geeks coming into the area from around the country, I recommend making the trip sooner rather than later, or else find yourself in a position with 'picked over' inventory (still good, no doubt, just fewer options). The best selection (and unfortunately, the place where things sell out the fastest due to location) is Castle Vav (1720 N Marcey St, Chicago, IL 60614).
I have found that the stock varies amongst locations. Some are better than others. That said, I have never been to the Binny's in Orland Park. Hoppy shopping...
If the traffic is good, you could make it to the South Loop Binny's in about the same amount of time it would take you to get to the Orland Park Binny's from FFF.