Still needs to get passed, however, most north valley NWRs check stations, Sac for example are run by the state. I just called the region headquarters, and couldn't she guarantee they would be open, but she did mention there's not a ton of effort to operate the check stations and be ready for the opener- take that as you wish...
I was also told CDFW's website would be updated as soon as they get word, and to check there for updates.
With specific regard to sac, I was told by a FWS employee that the hunt area at sac was in good condition before the shutdown and water, etc, was not a problem.
Duck hunting is a learning experience, if you don't learn something new on every trip you aren't really hunting.