Thanks for the info! I've been to the fort during the day but haven't made the trip at night yet. I didn't know that the road circled the fort. A couple of other places for dark skies are Washington rock at Pyramid lake. It's a short distance from the Needles and has some nice tufa formations for the foreground.
About twenty miles further up the road on the south end of the Smoke creek desert is Sand Pass. It's pretty isolated so you don't get as much traffic to interrupt your shooting.
about five miles further on is Bonham ranch. It's maybe 60 miles from Reno so there's virtually no lights to degrade the images and the low hills give a nice fov of the skies. And there's a nice hot spring there for a midnight soak.
Closer to Reno, maybe twenty miles, I like the 'Moon Rocks'. In the summer there are often people camping or kids partying but in the winter, say for the Geminids meteor shower, it's a pretty good place. (Although it's possible to get the glow from Reno if you aim in the wrong direction. Again, thanks for the info!