The game at Cal could be fun. Spend some time in SF beforehand - or even a Napa Valley tour.
Regarding an OSU trip? FWIW - here is my report from last year's game:
If you have never been to Ohio Stadium, it might be worth one visit for the “experience.” I have gone to several games over the years and will not be returning anytime soon. In Ohio Stadium the amount of "bench space" for your seat is 18" - the average male has a shoulder width of 21-22," not to mention what the average "butt-size" must be. When I found my seats at the OSU game, the guy next to me must of taken up over 2 seats of bench space (and he wasn't the only one). He knew the drill, got there early and never moved. My buddy and I were left with about a foot of space for the two of us. Talked to the ushers - they just shrugged their shoulders. Standing the entire game (much of it in the aisle) during a 37-3 beatdown from the Buckeyes was about as miserable experience at a football game that I have been a part of.