A small word or two of advice:
Don't smoke pot before the physical.
Don't take ANYTHING from work. I am a retired union Federal government worker. Very few things will get you fired. However...
At the local maintenance facility on a nearby military base they used to discard old shipping crates in the dumpster. A couple of guys started taking them home to salvage the wood. They were arrested for theft of government property, got their names in the newspaper, and got fired.
Government, and especially military rules can be extremely inflexible at times.