Sorry I missed your question above Mark.. In Q I have looked day and night with no detectable difference. There are a few LP' in the area, even more that TV Fool might show, but LP transmitters come and go way faster than the data base can keep track of them, sometimes only long enough to transfer a license, then off it goes. Those licenses can be had for $1 if you're in the right place.
One thing about nice n' dry Arizona is that you don't get inversions to play with.. At least in January. If it's there, it's usually always there. Hiding in the foothills off of Plomosa doesn't help either.