Most of the descriptions of the recolonization make it sound as if the population would be close together, maybe one major city with a few out laying villages, hamlets, or farming communities. With a population of 325,000, conceder the whole population of Wyoming is 583,223 (as of 2013), They couldn't spread all that far away from the central colony. Now conceder the fact that those groups would be all on the same Continent, again for ease of trade, support, and other utility matters. That is the reason I viewed the second Continent as a great place to see a rare "land" dwelling animal, that has yet to be noticed.
I could also see a few people trying to go off to the wilds to make their fountain and meeting a mysterious end to a Core Worm.