Flying in on the days when they are doing the fast taxiing is highly recommended. A wonderful day out and I can't wait to go again. Being close to the Nimrod or the Victor is quite special and as for the Lightning....
About four aircraft flew in on the day I went. I called in the week and received a helpful briefing. I think you have to be in before 10 or 10.30 before everything starts. They receive you and then minibus you to the spectators area. When I went the ground team kept us well away from the display area. They picked us up at about 4pm for our departure.
The only sad moment was the realisation that my 182 was the heaviest aircraft to get off the ground that day. Go and do it...