All the Mormons, preppers, country folk, etc.
You're not thinking well. "Mormons, preppers, country folk" have to sleep, nearly always in a spot without backup. I said 24-7 for two years.
That's what the "well regulated militia" is all about: "well regulated" means they get regular practice and sustain an organizational architecture that takes appropriate measures for logistical support. While for decades Americans did maintain their vigilance, we don't do that any more in significant numbers. It's reality. Believe it or not, it's also Biblical.