Thanks McMark... that's a sensible approach. Observing till 2 am or so and getting 3-4 hours sleep (and using my phone alarm) will make it feasible. Wow - astronomical dark is getting late, almost 9:30 on the 22nd.
Busy Saturday for me, aikido kyu test in SF mid-morning, visiting friends in South Bay afternoon and Sunday, Pinnacles (hopefully) overnight. Maybe see some other observers there.