I suppose a big city would have many advantages in the kind of disaster that you can recover from within a week or two. In a SHTF, TEOTWAWKI-scenario probably not so much. Me, I don't spend much time worrying about apocalyptic situations since 1) the world is basically hosed and 2) I'm not at all sure that I care to outlast civilization. Simple animal existence doesn't sound all that appealing to me.