[Jedi Master Pikachu]

That was one of the "marketing points" for the ISS, that it could serve as a waystation for Moon/Mars bound astronauts.

[Prophet in the wilderness]

I guess it would be a waste of time and money to build a smaller Space station behind the moon ( to protect the inhabitants from radiation from the sun ) but, that would create another problem of electricity for solar power. ).
In that way, they can stay longer, and it would be a place to go to in case of some kind of emergency or breach in the moon base.
Maybe I am not thinking feasibility, but, have a solar array in orbit on the sunny side of the moon and have some kind of mirror beacon to network it to the smaller spacestaion.