I will be digesting all of the above input. As clarification, the Capitol Corridor is really a local train, not an express, and is reasonably convenient for access to SFO Airport if one connects to BART at Embarcadero station via the Amtrak bus stop located just above outside the Hyatt Regency, code SFF. Reliability with a prior day arrival would not be a significant factor as it might with same day connections. However, the issue of a previous day flight SMF-SFO is a decent alternative that deserves consideration.

Thanks for previous and in advance for potential future input.