Looking at the flying in info it says that there is no landing fee
There's no landing fee anyway, they scrapped it this year. Interesting that you can't get in on a fly in basis on display days, I'll have to be at bit more previous for the next one! Trouble is of course for these 'buy your ticket first' affairs which usually entail buying quite a bit before is that you can never guarantee the weather. I've been burnt once that way after having to cancel a trip to a display that was too far to be practicable by car.