Well, I've already been since I posted and it was cut.
Six inch grass doesn't bother me. However, I have been there 5 times this year, between March and September, where the grass was over 16 inches high ON THE FAIRWAYS. One day, the grass ON THE FAIRWAYS was 2 full feet tall. I've also been there on days when it was cut just fine. Even if it had been just the fairways that were cut, nobody (especially crappy players like myself who love playing disc golf even though they suck most of the time) throws perfect every time... especially with wind like there is at CC Lake.
I just asked, as did Ron (who is a far, far better throw than I), because we don't want to waste the (now more than ever) precious daylight spending 20 minutes looking for every drive.
Although I'm unsure how much I either like or dislike Creve Coeur Lake DGC plays into my question... I'm sorry for wasting the limited space available for posts at these forums.