Another suggestion: If you're going before Nov. 30th, and you're willing to fork over $25 to get into the Ambassadors Club (it will become an Admirals Club after the 30th and I don't know what their rules are), then by all means do it. Unfortunately, the club is located past security to the B/C/D concourses, so unless you're flying to/from STL, you can't get in. But if you can, the club is located on the level above the concourse and the windows face the field, the area around the B concourse, and the "alley" between the C and D concourses. I've gotten numerous great shots from there.
An unexamined life isn't worth living.