It was a good many years ago now.
Have you ever been to the beach race at Le Touquet? That is the epicenter of motorbike fancy dress and absolute lunacy. I knew a guy who was doing alot of the beach races so we went over to spectate as his engine was goosed.
HOLY SHIT!!
The mad urban scramble through the town with all the non-pros trying to get down to the beach, for a good start place, and to see 1200 solos lined up for the off and start was amazing. I think it was the first year of no sidecars and quads, or something, like that. The buzz waiting for the first lot to come back, via the dunes, was electric and then the chaos of everyone else trying to even complete 1 lap! What fun!
Another completely mad bike event i went to was the Bol D'or 24hrs. The campsite action was as relentless as the racing. There was an outdoor kart track at Paul Ricard that was bordered by a campsite. This campsite was like something out of Mad Max ,with biker gangs, and they were armed with air rifles so each time we went past the campsite you would here pellets pinging of your helmet and the kart.
It is probably all sanitised now and, in some cases, for the better. The campsite drag racing at Le Mans, in the late 80's, and the 'Bull Ring' at Bathurst , which was still going in the early 90's, are things that have stopped which really is for the best.