I hear you, but setting up the show was a real pain even when you were on the airfield, so trying to set-up at Scampton (for it would be Waddo personnel) would be a nightmare. Lincoln was not the easiest place to get through three years ago, and I doubt it is any better today.
Also, it now seems the initial harsh comments about the Waddo Staish were a bit unfair. The airshow has always been a promotion seeking event and an opportunity for them to rub noses with CAS et al in the VIP tent. Can't imagine too many Gp Capts shying away from that.