There was an issue of Black and White Photography a while back (I'm not near my house so I can't tell you which one) where a guy takes shots in the desert at night. They tended to have a lot of foreground detail as well as star trails. If I remember correctly, he used winter nights so he could get longer exposures, calculated when the moon was either not in his shot (behind the camera) or when it would rise after his shot was concluded and used a compensation developer to eek more detail out of the foreground. I remember the article because he mentioned going to sleep in a tent with no flashlight (no flare) and having to set an alarm to get up prior to the sky brightening because of sunrise. IIRC, it was 7-8 hour exposures.