Wow... Holy thread Resurrection batman. Almost 7 years later.

You ARE allowed to carry in an airport with a permit if you do not enter or attempt to enter a sterile area. Be carful, there are hallways and corridors of airports that are before security that are considered sterile. These often include the airport police station, customs offices, etc.

Stay in the main guest area, don't attempt to go through security and don't go wandering into hallways and back corridors and you will be fine.