Best advice on the entire thread. The cities aren’t a good place, but a small community might be. You can survive alone if no one finds you, but there is strength in numbers.
Ultimately, though, no one gets out of here alive.
The need for formidable militias, say 10-20 well-armed fighters, can discourage a sizable group of attackers, when entering the foray from an unexpected front (as a support militia coming to the defenders currently under assault), and is even more of a need in the cities. I feel for the preppers in the city apartments, for example, who are good people, but would be facing some tough decisions.