[Weird - I thought I already posted a response here, but my post is nowhere to be found...]
I'm available any weekend in August, and maybe a few in July. That's as of now, of course. The company I work for owns my travel schedule.
I'd vote for San Mateo as a central area for most of us. Even better (from my South Bay perspective) would be Half Moon Bay. Just took the roadster for a cruise up Hwy 1. from Santa Cruz to HMB. Haven't done that in years.