Tony
I totally agree with your sentiment: Bicester is decaying and fast! I would like to propose that if you do get the site for preservation that you do not turn it into a theme-park like Duxford. To restore it back to it's former WWII glory so that our children can see what it was like during the war would get my vote
Like one of those re-enactment sites that those Roman/Medieval groups do so well and are so educational for the kids.
Good luck
LJ