I went. Large turnout, maybe 150-200 people. Very well organized with heavy equipment, roll-off dumpsters, heavy duty trash bags, etc.
People signed in and were assigned to one of about 10 areas to be cleaned up, lots of trash was removed. Lunch was catered.
Not all people cleaning up were shooters, as I heard some people commenting that "shooters were such slobs", and "we need to shut this place down". Also, a fudd shooter commenting on the large amount of "assault rifle" empty brass (actually steel cased Russian stuff) laying around. The fudd had no comment about the even bigger amount of shotgun shells that were all over.
Over all, most people were very friendly and were glad to be helping to keep the place open to shooters.
Other people that went can leave their comments.