Dunsfold is not available Sundays or Saturday afternoons.
BBC have it on Wednesdays for filming - apart from when Clarkson is sunbathing in the caribbean.
Airfield is a radio service on 119.1. But PPR required - and you had better check on fuel before going there as bowsers are not always available, especially for Avtur.
Airfield is indeed owned by a developer....but the housing is several years away yet.
Locals love to hear the sound of turbines.....go visit it if you have the opportunity.