No, this isn't a recipe (that might come later) just some thoughts on post collapse city life VS post collapse country life. I consider myself fortunate to have experienced Hurricane Katrina. It allowed me to see firsthand how quickly the thin veneer of civilization can dissolve when people start to get desperate.
I was very fortunate to be in the 'country' a few miles outside of a one-stoplight town on the north shore of Lake Ponchartrain. I was prepared. I evacuated (not far) with marine batteries, 12V fans, food, water, gas, chainsaw, camping gear, xtra fuel, batteries, etc. Driving back to my house there were no street signs. They had all been blown down. I saw no other vehicles on the freeway. It occurred to me then that I was entirely on my own. No phones worked. No power anywhere. No gas stations, no grocery stores, no help. If I was to survive, it was all up to me. It was an interesting feeling. I had to stop several times, fire up the chainsaw, and clear the road to get through. Power lines and debris covered the roads.
I was very lucky. The flood was about a foot shy of getting inside my house. Once I got back to the house, I lived on the screen porch for a month with no power or running water. I would read by candlelight, or listen to the chaos in the city on my battery powered radio. After the first night, I decided I needed a gun (I didn't own one). I painted "Looters will be shot" on my plywood, and carved a big oak branch with a knot on the end. Not much good against a gun, but maybe good against someone who thought they were dealing with a unarmed female, and better than nothing. But it was good to be out in the stix. The people in my neighborhood worked to clear the roads. I brought my neighbor a tarp because a tree went through her roof, and mine was mostly OK. She hugged me and cried. I had never met her before.
A few days later, I ventured out for supplies. I procured 30 gals of gas for $95.00 after waiting in line for four hours. I showered with water left in the pressure tank at the nursery I managed, and stood naked in my store drying myself off. It was surreal.
Hurricane Katrina provided me with an invaluable snapshot of both the worst and the best sides of Humanity. It made me realize how much we take for granted, and how easy it is for all that to fall apart. It fully reinforced my notion that if you wait for help from the government, YOU WILL DIE WAITING. And it convinced a formerly pacifist hippie to arm herself to the teeth.
It really was quite an adventure.