As I mentioned to Kevin, I wouldnt expect a permit to be required as its not a "for profit" or paid event. I suppose I should check. But, since its on private property, it shouldnt come into play anyway. The property management would be the one to have to make the call to the PD for the enforcement. But, theyd have to be there in the first place to know. To me, its not different than the firetruck guy setting up with his audio/visual.