I looked near guest housing too, but it would have to be at the very end of the westward dock to not hit the cabin doors/chests, and I'm not sure how it would work with boats (you can't even place a cart down on the railway underneath the needle right now). I think people will naturally head towards downtown, but we could put some signs & maps up at the end of the forked paths as well. I've been wanting to do a big 'overview' map somewhere, maybe that's the place.
[edit]: The crossroads there would lock the nearest 2 cabins. Basically anything 16 blocks away from the center point is locked down.