As always, Alaska may have different interpretation of the rules.
I was referring to airports with passenger service in the lower 48.

Just do not try to camp at an airport with aircarrier service.
You will not be allowed as it is considered a security risk.

vincent p. norris wrote:
Oops! I didn't know that. Haven't been to Fairbanks since 9/11. So
camping there may no longer be permitted.