No surprise, I taught at a reserve center in Texas (not Grand Prairie) recently and they did not even have anyone manning the gate. Free access to the facility and adjacent rows of helicopters. No security in evidence anywhere.
You should have gone over to the helos and tied balloons to them. Just to show how close you could get.
Then post it on facebook.
Of course, you would be finished as a teacher. But it would be worth the laugh.