Enjoy the exotic cars driving on the ring!
I've seen many nice cars there on the parking and driving the track. Think of Audi R8's, all lambo's, ferrari F50, 360's, 430's, a 599, Donkervoorts, etc.
I personally don't like the track experience of the ring too much. Maybe it is better to wait till almost closing time. I went once for 2 sessions and the ring was full of busses(!), very slow or very fast motorbikes, old people with a 911 who never went faster than 80 mph.
For me it's better to go to an organised track day where all people know what they're doing (or pretend to).