Old Songs: My favorite festival. Perfect except for the lack of shade in the camping area when it's sunny, and the hardness of the soil (bring steel tent stakes) lack of drainage when it rains.Champlain Valley: My second favorite. Only major flaws are lack of any camping and limited space for jamming.
Basin Bluegrass Festival, Brandon, VT: My local favorite. Mostly regional, not national, bands, but much calmer and more friendly than the average BG fester.
Peter.