Down periscope by a chance?

And I thin there'd be more someone along the lines of Sgt. Gardner from ME2. We decided that every crew member will ahve their own room to provide comfort and privacy on the lengthy trip, but that means other facilities would probably suffer from lack of space. The hangar would take most of the ship if you look at it realistically, and the dropship has to be docked outside. I'm thinking no dedicated officer's mess (Black don't like those anyway) and the rest pretty clustered together.