OK... As far as track stuff at Infineon Raceway goes, June 20-22 is THE MOST INSANE WEEKEND AT THE TRACK!!!
Unless you are a NASCAR fan, stay away, I repeat stay far away from South Sonoma.
It is THE LARGEST spectator event in California.
They start posting automatic road-side display signs a month in advance reminding everyone to take alternate routes and expect delays.
"They" arrive late Wednesday or early Thursday and camp/party 'til Sunday night/Monday morning. 100's of thousands come for this race ( SaveMart 250 ).
They bus them in from nine counties.
http://www.infineonraceway.com/schedule/major_events/nascar/
KT