The moon itself is about as bright as a sunlit landscape - no surprise, because it is a sunlit landscape and when you see it during the day it is similar in brightness to the sky. A moonlit landscape is, on the other hand, much much darker. There's about 18 stops difference, so it's going to mean that you will need at least two exposures if you want the moon and the local landscape to be correctly exposed.
The people are going to have to stay in one place for a while, unless you use a very fast film or ISO setting and a very wide aperture. Once someone is positioned comfortably enough for a 30 second exposure you can usually take it out further, so a small enough aperture to keep everything in focus should be possible. The people may not be perfectly sharp, because of slight movement.
Best,
Helen