[RandyT0001]

From the 4th edition, p.27

As a failsafe, an alternate base was constructed, so that the teams could be revived even if some unforeseen catastrophe overwhelmed Prime Base.

P. 22

From there (firearms training) trainees progress through a series of steadily more realistic situations, practicing contact and stoppage drills in both rural environments and in a custom built "town" on one of the projects training sites.

P. 23

The final element of basic training is the "civics" course, intended to teach the team how to deal with and rebuild communities they encounter.
It covers everything from physical infrastructure, through law enforcement training, to how to hold fair elections.

So it seems that TMP did have a back up base but the question is what happened to it - captured by Krell? Subverted by the Frozen Chosen?

So each team member has training on how to make contact with post-war (at 5 years after the war) locals.

In addition each team member has training on the basic needs of a community, food, water, shelter, clothing, sanitation, etc. and they know enough about law enforcement to be able to teach it to others.