Ivan,
I was in Cherry Springs State Park that night along with about 50+ vehicles. The sunset was surreal. One observer packed up his tent and gear and left. I was with a couple of other club members and after dark, it slowly cleared out enough to observe what I came to see. I took a meter reading of 22.8 = NELM 7.0 at the zenith. About 20 degrees above the horizon, the views were a bit murky. Another member & I left the next morning while the other stayed 1 more night. She said it was not as good as that Monday, 9/14.
Al