Well here is my small contribution. The dark sky finder map, is excellent.
Also, even with my K20 and unable to turn off DFS - dark frame subtraction, I was able to capture quite a bit.
Stars over Sedona, AZ
Lens: Carl Zeiss 28mm f2.8 Distagon
Camera: K20
Location: Sedona Vortax @ Airport
ISO: 1600
Shutter Speed: 25 seconds
Aperture: F2.8
Just a straight up star shot at 25 seconds, single frame. This was about a hour before the Moon rose and washed the sky out to a degree. Right in the center there is either a faint meteor trail or satellite... I was actually surprised at the outcome, however was hoping for a bit more definition of the Milky Way, so next time I will use use a wider angle lens, either the 12-24/f4 @12 or my 10-17/f3.5 FE @10 and try to stack multiple frames. This is dead center on the Milky Way. I should have put on my FA31 but just used what I had on the camera and I wanted the widest field of view possible. This is really my first attempt and an experiment at that.
Two hours out side Phoenix is Congress, AZ and it should have skies much darker. This image was pretty much dead center down town Sedona, AZ at the airport which is dark. This would be a "yellow" area (light pollution) on the Dark Skies map link above. Congress, AZ on the other hand, would be in the "gray" - pretty much the same dark sky conditions as Kitt Peak National Observatory outside Tucson. That, I am guessing would probably be worth an additional 1 to 2 f stops. Using the K5 with the ISO maybe pushed up to 16,000 or 32,000 and the GPS/Astrotracker should produce extraordinary good results (or would certainly be worth trying).