Oh I forgot to mention, since you are EE you might find SJ / Santa Clara / Sunnyvale / Mountain View really cool. Googleplex, Cisco Campus, Sun, National Semiconductor, Micron/Aptina, Nuvation, Yahoo, eBay, Altera and so on is kind of neat to see.
In CA, most people drive 10 miles/hr over the limit so Yosemite is probably more like 3 hrs away.
If you want any info on Yosemite, I can give you some advice since I was just there 3 days ago. Note that if you do go to Yosemite and decide to do some camping, it drops below freezing at night so you may want a winter jacket and some booze to keep you warm. If you are an avid hiker/scrambler, there are some beautiful views in class 2/3 scrambles, while climbing does offer you some good bouldering and 5.9-5.12 top roping and lead clmbing. Although I'm sure there's some good bouldering in the Canadian Sheild, I thought Yosemite > Canadian Rockies.
For San Fran, if you do go there, I might bump into you as I may be there for a few weekends visiting a cousin there. I'm more interested in wondering around then the art museums, Alcatraz or any of the main tourest sights though.