re: North pole of the Moon
If the Moon is tilted 1.5 degrees, and the Sun (from the Moon) is one third that size, then there will be many moments when the Sun will lie just below the horizon and as there's no atmosphere, it will be very much be like total darkness.
For Mercury, there were radar beams sent to Mercury which returned a signal from the north pole, showing something like ice, which surprised everybody. The same kind of signal from the Moon is much weaker and took longer to spot.
Raoul