You're not really clear here. The pictures you linked to were, according to the text, all taken at 30 seconds with a 28/2.8 lens, or 40/f4 lens, both at max aperture. A rule of thumb to keep the stars looking like points is 700 divided by the focal length: 700/28= 25 seconds, 700/40= 17.5 seconds, so his images will have some streaking visible. Note he says he uses the same time with lenses of different aperture (a full stop different), which shows that at night exposure can vary and still produce a good image.
No need to use the whole roll out in the desert. Pick a subject you like, and bracket a few shots, i.e., expose at different times for the aperture you choose. I'd suggest varying time by a full stop, e.g., 4-8-15-30-60 seconds. If you want to try a 30 minute exposure, go ahead. The stars will appear as streaks, but a phenomenon known as reciprocity failure will probably limit overexposure enough that you will get a usable image. The moon is a factor-it's still close to full. I'd try a shorter exposure too- maybe 10 minutes or so, and maybe 3 minutes. All the increments you mention are not needed-reciprocity failure will reduce sensitivity so much that large changes will be needed to produce significantly more or less exposure. I have not used it for long exposures, so maybe someone here with direct experience can give you more info. As mentioned, usually slower film is more suitable for what you're talking about, except for the effect you can get.
Don't forget the tripod.
Why not use the film in a variety of situations? Pictures are everywhere. It's usually used handheld in fairly dim light, so inside a building, on the street at dusk or at night, etc. will show you its versatility. How about at the ocean early in the morning or late in the day?
The cloudy days we've had are perfect for using it outside during the day, as the light is reduced enough, and the evenness of the lighting cuts the contrast. On the other thread you started about where to shoot in SoCal a couple suggestions have been made, and if its known where you are and what your subject interests are, more suggestions will come out.