For a few years after I'd left the RAF, I was still able to gain access to the station as I was a civilian member of an on-site club and had the relevant pass.
But I watched the place getting tattier and scruffier as the years went by, with fewer and fewer people in blue around the place. Not that they were in the latest fashion of combat pyjamas, they simply weren't there, although a handful of scruffy civilian contractors were wandering around instead.
A real shame. So I left the club, handed in my passes and preferred to live with memories of happier times, rather than the reality of 21st century squalor...
Worst ever was going back to RAFC a couple of years ago - to find no aeroplanes (apart from a few plastic pigs) and no students. The place was like a morgue.