Join Date: May 2012
Location: SF Bay Area, CA
Programs: Amtrak Select Executive, Hertz PC, National EE, IC Diamond Ambassador, ALL Gold, Hyatt Disc
Posts: 531
I'd call and ask AGR first to change with the condition that you understand that if the CZ is running really late that you will change in SAC. I know people have made that connection in Davis and Emeryville. I have also purchased a ticket from RSV-EMY before as we'll (due to a last minute travel change) and I was allowed to stay in my room until Emeryville. As you said, that aspect is handled by the on board crew, however it is possible.
Either way you should be able to visit your friends in the Bay Area and have a nice journey.