Someone on the Cinder Bridge mailing list pointed out that saying we'd be playing at the "top" of Mt. Lemmon was a little vague. If people literally go to the top, they'll be at the Observatory ... a thousand feet above where the music is.
So. The gig is in Summerhaven, which is around the bottom of the top of the mountain. Music will be right past the visitors center. When you see the big tentlike thing, you're there.
Now to send another e-mail to the group. Hopefully they won't get too annoyed by the multiple messages.