Also it seems to me that you might need to do some sort of maintenance on the lower hull at some point while you're on the ground. You might want to allow a couple meters for DC crew to move around down there. I would suggest a ramp that comes down from the middle-ish area of the lowest deck that lets foot traffic embark/debark and maybe a cargo elevator or two. Having large cargo doors on the sides are certainly welcome as well as they would be easier to load in orbit. And if the ship landed near a loading dock (like modern day semi-trucks have for the past century or so) those large doors could be used on the ground, too. In fact, if there was some sort of lift-gate mechanism like on modern trucks, that would make those doors easily usable without a specialized dock.
There's lots of interesting options.
--Alex
There's lots of interesting options.
--Alex