Wayne,
Not such a tough decision.......you can do both. The WCC is a Sat. Sunday event. You can come to Tour de Vin on Sat and then go to WCC on Sunday. This years featured marque is Jaguar.
http://www.winecountryclassic.com/event/schedule.html
there is also a Historic Sports Car club event at Thunder hill this same weekend
http://www.hsr-westracing.com/main.htm
and The Goodguy's will be at Pleasanton for their summer get together
http://www.good-guys.com/
I'm going to pass on WCC and wait for Montery and the "CENTURY OF FORD RACING". I may go over to poke around at Pleasanton on Sunday though.
Thanks,
Mike "monster"