I am traveling to Chicago soon and wanting to fly but having a hard time finding info. 1. Ok to take off near navy pier or near water front area? 2. Any suggestion on abandon or ghost town areas via subway? 3. Anything I should be aware of other than the city has a lot of air traffic including heli's ? I'll have only about 6 hours to travel fly and get back not including a 2 hour pre check in buffer. Any help is greatly appreciated.