FUN! Hey Bill, I am in - weather dictates what car, are you going for sure? I may bring a tent out, shade at this park is non-existant, was here for a Vette show a while back..
More info here, looks like all cars welcome (best kind of shows, no old car snobs):
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2006 Summer Thunder Cruise-In
The date for the 2006 Summer Thunder Cruise-In is scheduled for Saturday, July 29, 2006 from 4:00 pm to 8:00 pm pm. In the event of rain, the cruise-in will be held on Sunday, July 30th from 4:00 pm to 8:00 pm. We’ll be at Franklin Park, 17501 Franklin Park Drive, Purcellville, VA 20132
(540) 338-7603
http://www.summerthundercruisein.com/upcomingevents.htm