The one thing we did learn last year is that the gates may open up officially at 10:00 am but they let people in much earlier. We went to "check it out" at about 9:30 and drove right in. I HIGHLY recommend that you do the same. This town, and hwy 1 get tied up REAL bad soon after the show opens. So get there and get in and you drive in and can leave a little early without any problem. I do also recommend as I did last year and that is to drive down hwy 1 to hwy 84 to get up and over the hills to 101. 92 out of Halfmoon bay is pretty tough at the end of the day as it is in the morning coming in if you are late.
I had a wonderful drive thru 84 behind a Pantera winding thru the hills.