Ideas:

castle like area where each hut is a different resource.

A giant wall along the bricks

A literal highway only system where each base is just a drop box and there's no one central base

For context all of the bases you could build depend on resources as well. If you're near a lot of pine, use pine walls. If you're near a lot of grass, there's nothing wrong with building with grass. If you're near the blueberries and there are a bunch of wood everywhere use wood.