Ah the KF Class Signs! I got saddled with them for 2 straight years. The purpose of them was to inform visitors to the National display and direct members where to park there cars in the lot. But the signs had to be put up early to direct the members because we have a lot of car owners who unload their cars and won't move them until the day of judging.
No matter how the signs were anchored, they tended to blow over.
The signs were there at Sweetwater, but it was Tuesday or so before some one thought to bring them out. The view I expressed was it was too late for them to be effective (certain people were not going to move their cars; one in particular because it really didn't run) and there weren't that many cars that being scattered out as they were, the judges would not be likely to miss any.