You gotta hit up the Delta when you come through the bay area. Best to place to ride anywhere. You can find miles of flat water any day of the week, including weekends, even on holiday weekends as well. Enjoy your time here. You're gonna have a blast.
As far as where is Naci located, you would want to hit up Stephan or Seth to ride Naci on your way from So Cal up towards the Bay area. You will just got off of Hwy 101 in Paso Robles and head west about 30 minutes. Yosemite is nowhere near the 2 locations.