Perhaps I'm late to the party myself, but why just have "one" location?
If the SHTF to the point where armed gangs are roving the countryside, its high time to have a Plan B. Most of us reading this now probably live in soft, indefensible areas. Not a problem when civilization's in session, and honestly living in a fortress would get old real quickly.
But, when the snot hits the Kleenex , I think in the event of determined resistance its best to withdraw to a pre-arranged Site B , where you CAN either disappear, or ambush your pursuers. Remember that not every roving gang will necessarily care about your stuff. You having a different skin color can be enough to trigger a pursuit from racially motivated killers, similar to what happened in Bosnia.
The more prohibitions you have, the less virtuous people will be.
The more subsidies you have, the less self reliant people will be.
-Lao-Tzu, Tau Te Ching. 479 BCE
The 1911 may have been in wars for 100 years, but Masetro Bartolomeo Beretta was arming the world 400 years before John Browning was ever a wet dream.