December 22, 1999 was the night of the allegedly really bright full moon,
so I spent a few hours on the deck with camera and tripod.

I used the following factlets to get my exposure time:
1) "sunny 16 rule": if your film ASA is x, and you're shooting in full
sunlight at f/16, your exposure time should be 1/x seconds.
2) Full moonlight is about the same color as full sunlight, but about
1e-6 times as bright.
3) For extremely long (or extremely short) exposure times, add a stop
of exposure to account for reciprocity failure.  (Meaning: film density
is marvelously predictable as a function of exposure, until you get to
the extremes of exposure time.)

My film was ASA200, so for f/16 I figured 1/200 s for full sunlight, 5000 s
for full moonlight, and doubled to 10000 s for good measure.  That's a 2 hr
47 min exposure, which I didn't have sufficient patience for, so I switched
to f/4 for a ~10 minute exposure.  Even then, it took 2 hours to do 12 shots.