[quote=Partisan]
Are we intended to leave the airport and settle down on our own or are we supposed to stick around? More or less; will it be free roam or is there some plot making us stick around?
[/quote]

The airport is already a pretty successful settlement by the time each PC gets there. We're talking a good year after 'the fall', so everyone should by now have learned the value of not being alone. There is a plot in place, but a character can do what they like. I won't be playing a member of the survivor group, so if one or two folks decide to break from the group, I'll have no problem handling that IC. 

It's a big risk to do that, but they could do it, sure. The plot isn't constructed in such a way to funnel players from one place to the next. Survivors do what they want, but the plot will have a way of catching up to everyone.