I'm not even being cryptic any more and I urge readers to look and read the past comments.
The "parking charge" was $5 per person. I know one bloke who parked with only him in the car= $5. Saw another with 4 pob= $20, me, $10.
Do you get the drift? That's an admission charge for people, not for parking a car. The cash is a donation as far as I'm concerned, but you can't charge admission to a fly-in as per the invitation at the start of this thread.
End of discussion.