Cal never sells out except a rare year vs Stanford when both teams are good.. Will probably be able to walk up on game day no problem.
But, I want to sit in the Cane section. So, I will very likely buy well in advance.
train stops at Emeryville, I believe. Very close to Cal campus with some hotels/motels walkable from the train station. 15 minute Uber to the the Cal stadium.
See you there!