Hi,
I don't think you need to spend that much time - whenever I've gone, I usually stay in DL until about 9:45, then head over. Once you get to California, just head right over to the kiosk (it's located by the rapid ride), and get the fastpasses. There is usually a small line, but it moves really quick. I've never gotten anything but a blue ticket (which is a pretty good area to watch from). Remember, these are special fastpasses, so you can still use yours for rides as you normally would. Also, I don't think they open up the viewing areas until around 7:15-7:30, so there's no need to go around 6:30. Just to be safe, ask a cast member at the kiosk when they suggest coming back at night.