If I am not mistaken from Google maps, there are some smaller towns around the area, spread out by quite a few miles, Also if i'm not mistaken some one set a cabin on fire to so maybe the smoke can see visible quite some distance away? so I suppose you can find some options there so we are not altogether straight of the bat but also not so far away to the point of never seeing one another :P

Although that broadcast idea is not a bad one, could be a bandit trap to lure survivors in and nick there stuff and then send them to the after life or something lol