I was thinking about this myself , apart from Beltring I remember attending a show called the DEBDEN CARVE UP! years ago.
It was at the old RAF Airbase in DEBDEN ESSEX ,which the army had called carver barracks And was then home to an armoured regiment when we visited.
It also used to be home to the USAAF 4th Fighter Group , We were told that during the war the fighter Ace Capt. Don S. Gentile was based there . Don and his famous P51 Shangri-La got a little low and bounced off the ground while showing off for the cameras ON April 8th 1944 and that he was sent back home after this incident, and that his aircraft was broken up and dumped into a scrap pit at the rear of the base
The airfield was completely intact with hangers and restored control operations room remaining and runway which had not been used since 1975.
The show wasn't open to the public and the army brought out all there armoured vehicles which they took us around the airfield in .I think my brother drove one as well.The show wasn't open to the public so we could drive our vehicles all over the airfield up the runways etc.We were taken for a tour around the airfield into the ops room etc and I remember a big guy! who people called blue who was there with a gmc truck that he used to ferry us about in.
I also rember camping at Biggin Hill with my brother and a friend with our jeep and after the show ended driving along the old runway which was out of use and watching as two A10 Thunderbolts landed and taxied from the main runway over to where we were parked , The pilots got out and we started talking to them! I think shows in the old days were so unrestricted.