Welcome to the forum!
That's a good question.
I would consult with an attorney on this one.
13-3102. Misconduct involving weapons; defenses; classification; definitions: http://www.azleg.state.az.us/ars/13/03102.htm
A. A person commits misconduct involving weapons by knowingly:
12. Possessing a deadly weapon on school grounds; or
It would be very wise to get a solid legal opinion on this one.
Don't ask your friends, don't ask law enforcement, ask an attorney.