I'd go one step further. I'd print out the TSA rules, the airline rules, and federal laws. Specifically print out FOPA.AggieMM wrote: [*] Do your due diligence with the Airline and TSA policies before leaving.
Realise that the people you're dealing with probably almost never see guns and arent sure what to do. If a supervisor isn't available to too busy, having the printout can help speed things. It can also help correct a supervisor if they are wrong, and encourage them to check into something.