I went to the August Cavallino's and it does get very busy. Best to get there 7.30 or so as you may end up parking up the street, though it doesn't matter that much.
There is a great mix of cars, but mostly Euro's, a good mix or old vs new. Alot of Porsches, few Ferarris, Lambos, etc.. You go get a nice mix of old school, were a couple of Mustangs when I went, Cobras, 356s, and others.
Not as many bikes though.
Definitely worth going up and taking a look, nice coffee and a great morning out.