I can't speak for the NorCal parks, but I wouldn't go anywhere near SFMM or KBF that week. It is one of the most crowded weeks of the year at both of those parks. SFMM sometimes hits capacity during that week - which doesn't even happen during the summer. If you do decide to go, definitely plan on Flash Passes / Fast Lane. Food lines will be insane, as well, so plan on eating outside the parks.
SFMM will also be enforcing the vaccine/test mandate that week, so be sure to bring either your vaccine card or a negative test result with you. They will have a testing station set up outside the park, but - for your own sanity - don't plan on waiting in that line.