Question to SF Bay Area peeps

We'll be buying our plane tickets for Potlatch very shortly. We'd like to spend a few days in the area before or after the convention, so we can see some Bay Area people, sights, and events rather than just the con.

The purpose of this post is to ask this: are you aware of anything happening before or after the con that would lead us to prefer one over the other? (Performers coming to town, major local traffic-generating events to avoid, etc.)