Set yourself up with a P.O. box near the base, don't risk it.
^This right here, especially since you live in the barracks. I've had brothers who would get there shit sent to their on post housing and some of the dudes(in barracks)would ask to get there shit sent there too. Problem with that is the "fake name" (for buyer to get shit sent to dudes house)issue and multiple packs to one address.
i would get a PO box or just go out in town, I dont know about now, but when i was there last time in 2006 people wanted into pharmacies and walked out with test and deca bottles. Also my buddy use to get shit mailed to the ship.