awfybig: You're not saving any time going up to Bridgeport to cross the Sierra on the way to SF. You might as well cross via Yosemite and say you drove through. (I suppose you would save the $20 park entrance fee by skipping it altogether.)
If SF attractions are the draw, then skip the side trip into Yosemite Valley proper. (Just make a right turn instead of left at the Crane Flat junction).
Awfybig,
I've been back and forth between the Bay area and Lone Pine many times. Shortest and fastest route is via hwy 120. I endorse Steve's recommendation to stay in Mammoth Lakes, and simply take 120 through Yosemite Park, and as he indicated turn right when you get to Crane Flat (this avoids the park "proper"). Hwy 108 is scenic, but torturous. Google maps is not correct when it shows shorter time via hwy 108(IMHO).
John
