[quote=@MissCapnCrunch]
[i]Good question.. as I didn't really decide yet. :lol
More than 50, less than 200. I'll take suggestions?![/i]
[/quote]

It depends on what you are going for. The more recent the event the less organized the society. The timeline also has an effect on the background of the story. You say they built this city as a refuge, but if the date of the event is recent that would bring into question as to how large this city is and how advanced they are in general... There is a lot of weight in this topic.