This is a really cool simulation, but here's my problem with it, on the psychological level...
The people inside know that there are people on the other side of that wall that can run in a save them if a real accident happens. The stress related to that scenario isn't there, but in a space trip, it's DEFINITELY there.
So, why not do this in the Arctic, with a minimum 3 day travel distance between the outpost and any rescue attempt? At least then you mimic the travel time for the Moon. If stuff hits the fan on a Moon base, it'll be three days before any help arrives...assuming you have a standby rocket on the pad for such a scenario that can launch nearly instantly.
Psycho-social stress is one thing...being locked up with your mates for months at a time. But REAL danger stress is something even more pronounced when it comes to space travel, and this experiment completely bypasses that.