If Sonora Pass is open (108), take that route. It will be the shortest and fastest. From Oakland, this has taken me about 5.5 - 6 hours on average to Bishop.
If it is not open, you can take Monitor Pass (89). Although I've taken Monitor Pass several times and finally concluded that it does not cut down on time or mileage very much and that if you don't like windy roads, just go through Nevada, which is 50 > 89 > 88 > 756 > 395. Going this route will be far less windy, you get a cheap gas station (7-11), and a break. From Oakland, this has taken me 6 - 6.5 hours on average to Bishop.
If for some odd reason there is a snow storm in Tahoe, take the south route going through Bakersfield.
There's some campgrounds along Sonora Pass, so you can stop there if you like.