Having just now passed through Leatherneck, and Bastion (which is just next door), as well as COP Dwyer, I can relay from first-hand experience that the reason those sites are where they are has everything to do with the old airfields that they were sited on.

And although Leatherneck is big and a dizzying warren of ISO containers and life support areas, there aren't a lot of amenities. The Danes have a nice exchange over on Bastion, and I almost bought a Snugpack jacket at the British exchange for a steal, but there isn't a whole lot of comfort (besides ice cream) there either.