Thats the whole point silverease, both myself and one9iner were within 5 miles of the aerodrome around 11am - the first of the displays was scheduled for 11:45
That's *my* point
It's an all day show. Get there by 9am, get parked, you have two hours to look at the static displays, trade stands, stalls etc. before the flying display starts.
Timing your arrival to get you there with enough time to park up get settled and find a spot is asking for trouble. Which it sounds like you got.