[acparmed]

Let me say that as a private pilot I have never encountered any security per se at any municipal airport. I carry CCW whenever I board my plane in North Las Vegas. IMO if you arrive at an airport where you are unsure of the CCW laws would be to leave your firearm in the aircraft. I would not land at any large international airports, instead find a small municipal airport and land there. I can virtually promise that there will be no security check-points for transient parking.
I always have my survival pack loaded with food, water, extra ammo, magazines, etc, etc. on the airplane with me and that's where it always stays when I land somewhere.