I'd say if you're single, then there is no single brand event more vast than this thing. Not having to worry about entertaining a GF, or the rest of the family is the key. There is about 1000 mustangs in attendance, heavily biased on S197.
I've been twice, and the first time I went I had the red car that coincidentally just happened to be a mustang. I had a real good time and only spent three days there. I did have a radiator failure on the way back, which led to a heater core failure when adding a can of stop leak caused a rupture there as well. (Made for several hundred white knuckle miles back not knowing if the temp ga. was gonna start to climb and the radiator was gonna puke it's guts, but is stayed at 180, and just fogged the windshield instead).
The second time I had no car, and went as a spectator. (big mistake), if you don't have a mustang in the parking lot, just try to back out a non-mustang,or move through the lot to get somewhere....you're treated like you don't exist.