If the SHTF, city dwellers are pretty much screwed. Those with the best chance are those who are the farthest away from civilization who have planned for sustainable sources of food and water.
Personally, I believe in preparing for multiple contingencies. A powerful earthquake would just have me hunkering down in my house. A financial collapse that leads to widespread unrest would have me going remote to an area that would provide me with isolation, water, lots of game, fowl, and fish. Very doable in Alaska if you have an airplane.
“If the SHTF, city dwellers are pretty much screwed.”
I think thats a myth. Sure if you live in a high rise your chances will be slim. Otherwise the remote farmstead is highly vulnerable. Whether its the govt forcing you to relocate or looters seeking to steal what you have.
In a mad max scenerio it will take a small community working together to survive. In anything less there are advantages to living in areas more likely to receive aid or emergency resources.