The closest I have come to "worst case scenario" was hurricane Rita. We had just witnessed Katrina, and we expected the worst.
We live outside the city limits of a small town, and we evacuated for the storm, but came home 3 days later. We had no electricity for 3 solid weeks. We came home from Arkansas with generators 155 gallons of gas, and 2 window air conditioners. Before the storm hit, I bought a block of .22lr shells, and 10 boxes of #3 buckshot for my 20 gauge coach gun that rode home in the front seat between the wife and I while we brought our supplies back home from Arkansas. We came home after the storm to 3 solid Texas counties of total darkness. The miles and miles of darkness was a sobering experience, and I was one of the few vehicles on the road. I felt like a perfect target with my truck and trailer full of supplies. The highway patrol would not let us through a road block until I showed them I had the fuel and supplies to sustain ourselves. He looked in the truck and saw the double barrel in the front seat and just said "be careful."
At night, you could hear the sound of generators as far as the ear could hear, and we ran ours for 3 solid weeks. The nights were very dark and I was expecting anything. I did not fire one shot, and I never heard a single shot. At that time and in this part of the country, the life of a thief would have been a short one. I think the riff-raff were wise to that. I heard of no problems.
When our electricity finally came back on, I had fuel for 3 more days. The most important tool was probably a good Stihl chainsaw.
My biggest mistake was not emptying the freezer before we evacuated to Arkansas.
C. Davis