Just got back from taking part from about 10 until noon.  Pulled off and went home for lunch since by noon traffic slowed to c-r-a-w-l.  There are one helluva a lot of very nice cars out there.
Think I'll wait for the temp (both outside and under the hood) to cool down and head back out again.
I saw a ton of 50's and 60's Detroit muscle cars, but there were also a good number of Porsches 

, a few Ferraris, Astons, Jags, etc.
Seems like 1 out of 10 cars were Corvettes.