I seem to remember reading in Sailplane and Gliding, the magazine of the British Gliding Association(BGA), a few years ago, an article regarding planning permission for airfields. The advice, if I remember it correctly, is to take the b*st*rds on directly rather than trying to keep it quiet. I'm afraid i don't have any links to give you nor any dates of backcopies of S&G, but if you give the BGA a call I'm sure they could point you in the right direction.
Good Luck