Here are a few tips:
I'd go over the
www.TSA.gov www.FAA.gov & your airline's website/SOPs.
I'd advise printing out the most recent website policy forms too to take with your travel documents.
When you declare your firearm, be polite, calm & say in a clear voice; I have a unloaded secured firearm in a case that I want to declare.
Wait for the airline employee to explain what they want you to do.
DO NOT use humor, sarcasism, slang, or be in a rush(late).
In Seattle's Intl airport, they had signs in 2012 telling customers to not use humor or make jokes.
For travel, see;
www.gunlawguide.com www.NRA.org www.knifelawsonline.com .
Stay safe & stay legal.
Clyde F
PS; Id also take a few cell phone pics of your firearm and items, so if its stolen or damaged you can document its serial number/description.
Airline employees and TSA agents can & do get caught stealing weapons.