Craig,
With all these car shows its just a matter of timing, we get there b/w 8-8.30am and the line-up was a whole 5 cars, and you get the best parks. Getting out was easy to, if you plan on leaving at 2pm be prepared to wait. If you wait you can see all the cars leaving - park a chair at the gate and enjoy. Really depends how committed to these events you are, for me most of these events is a 6hr return trip, so I stay a while, more driving in the zed yea.
Dale