Which Moon base(s) are good when Mission to Mars happens in 1 month

Moon sites

Noob question: Which of these spots should I grab on the moon, if I know that Mission to Mars will finish in slightly over 1 month already? In case that matters: Mass Drivers is currently in work, so no mines yet.

I was thinking either

• Mare Imbrium for the metals and fissiles or
• Mare Tranquillitatis for a bit of everything except water or
• Shackleton Crater since it is the only half decent water site

I know I do not want 3 mines and probably not even 2 since Mars is just around the corner, but what to pick?