Did it 4-5 weeks ago. Dead easy, as has been said get in before 10:30 to make sure you don't miss the display.
Was busy, but not too busy (5 or so in circuit). Check the museum's website for a quick run down. But as i said it's straight forward. Even if you're running a little late and the display is on, they don't close the airspace. It's a very friendly affair.
If you're landing on 35 make sure it's a greaser.....EVERYONE is watching!!!!