Dave U.
I was a member of Bruggen Gliding Club and the main reason it worked was that the club flew on weekends and the Tornados didn't! (mostly)
As has been mentioned, FOD could be an issue but the main thing to worry about in my view, was all the structures and airfield/nav. equipment on the field or near the runway. These made it imperative to land in the right place but it was a big airfield. I seem to recall that flying over the Married Quarters provided quite a reliable source of local thermals. The gliders were even kept in one of the HAS. The club seems to have been well supported by the Station and of course it helps that all users had the same boss.
Flug.