To be honest, if it was even 2 weeks after it had happened I'm not sure that any settlements or anything would have even been built. This is assuming the apocalypse came about because of some sort of nuclear war of course. If it had, then a year or so might be more appropriate for settlements having already been built. But it's your RP, I don't want to seem like I'm forcing my opinion on you so just disreguard this if you'd prefer 2 weeks.