I went yesterday (Sunday) also, the traffic was dire as it always is at the biggin hill for the air show. I arrived around the same time as you one9iner so had to park outside the main carparks to the right and walk in across the whole carpark to get to the display area. I was walking in as the apache and lynx were doing their displays.
On the whole the show was not bad, cant really complain about the planes going tech as thats just the nature of the beasts - a bit disappointing not to see the vulcan tho.
Last time prior that I went was three years ago and there was a much better display, however alot of what was missing is explained by the fact that our military resources are stretched with Iraq and Afgahnistan. There was still alot to see and on the whole it was quite a good show.
I just wish they could do something about the traffic but I cant see what they really can do - perhaps have it pre-pay only so there are no queues at the gate.