Hey,
There's a great jam band concert going on at the Cove Campground in Gore, VA (near Winchester) on 4/20/2007-4/21/2007. The cost is 32 bucks for the tickets, 25 bucks for the camping fee. The concert takes place over a few days. Good bands, good vibe, good time. Check out the webpage below for more information:
http://greendoorpromotions.com/420fest/
Hope to see all of you there!