Yes, I think Guzzi people are unique- at least in the states.
In my experience, a typical rally is that most folks arrive on Friday- often late. There's some staying up late, drinking and general partying, but not loud boisterous stuff (except maybe the Wisconsin boys ). Mostly it's sitting around the campfire, talking about bikes kind of partying.
Saturday, about half the people are up just after dawn and off for a ride until the evening meal, which is almost always included in the ridiculously low rally fee. Less drinking on Saturday night, then Sunday morning at dawn most riders are up, packed and leaving with the sunrise.
Guzzi riders tend to be folks who like to ride. Not so much bar to bar as real, backroad, scenic touring. It's a fun crowd. BJ was a real pioneer and a champion for Guzzi riders. I had the pleasure to meet him at a couple of rallies, and he really was as described- a gentleman, knowledgeable, and a good entertaining conversationalist.