We're in the same situation as Inkundernails. Photo equipment really can't go into "cheap" bags. 1 roller each (not locked unless gate checked because it's impossible to open and grab) and a small backpack with 3-4 bodies, computer cords, and wallet, watch, money clip locked before ID check. We fly from BNA also and get a bag check about 70% of the time. Locking the bag means they must wait for me to collect everything from the belt before swabbing, etc.