I know this post points out the inconsistency between modern concerns and historical “facts”, but here’s an attempt to solve the problem off the top of my head:

It sounds like they could use a solid landing pad, similar to a helipad, like what we would make out of concrete on earth. Carrying water and bags of concrete mix to the moon is costly, so instead try to figure out a way to make a concrete mix out of the moon dust itself, and that uses less water than usual. Bind the particulate together so it doesn’t dust up when disturbed.