Huge group rides fall somewhere between "visiting my ex-wife" and "root canal without anesthetic" on my spectrum of "things I really don't want to do". They're like slamming your hand in a car door: "Well, I've done it once, now I know what it feels like, so there's no need to try it again". I went on one once, about 15 years ago; it was initially a very cool experience seeing a couple hundred motorcycles gathering in a big parking lot before the ride; it took all my self restraint not to do the "We wanna be free to ride our machines without being hassled by The Man! ... And we wanna get loaded" speech.
And then the ride began, and it was more Peter Griffin than Peter Fonda.
Noise. Fumes. Crawling along at a pace barely above a duckwalk. Scary inexperienced riders on bikes way beyond their skill level. Basically it was a leather-clad traffic jam that, if we were stuck in it in a car, we'd be white-knuckling the steering wheel and cursing all of mankind. I think I made it about ten miles and just peeled off.
"No matter where you go, there you are."