Aircraft the MP would use?

[nuke11]

Well you can check off the CH-47 and C-130 as they are in Prime Base.

I have thought the C-123 Provider would be good as well DHC-5 Buffalo.

The OV-10D would be a good aircraft.

Any Cessna would be a good aircraft to use, there will be plenty of spare parts available 5 years after the war.