Here is a sketch of my initial table layout.
The buildings are based on what I can see in the below pics from the show. This area of the mars base seems to be where the majority of the action took place.
It looks like there are a series of 3 hangers in pic 1, then a large bio-domb behind it, along with a tall building. The surface looks like concrete made from the martian soil with painted road lines. There is also some piping that connects some of the buildings. I took some liberty moving a building or two around, but I believe this plan will adequately resemble the base and allow for 60+ figures to skirmish on it.
Now I am off to Walmart to buy a hamster ball to use as the bio-dome.