well ive traveled all over the east coast to see furthur, but mainly only in the south east for outdoor venue shows. I know there are some great outdoor venues like jones beach up north so im sure im short sighted on this one. It seems to me like a lot of outdoor sheds are the same for the most part. One of the most surprisingly pleasant to me was the place furthur played in simpsonville sc in the summer of 2011. Also chastain park amphitheater in ga would be pretty sweet if it wasnt a nightmare to park and logistical stuff like that, i caught moe and the allman bros there this year. Ive been to merriweather post and most of the major outdoor sheds south of that and nothing stands head and shoulders above the rest.
you've obviously never been to bethel, it's no shed. Jones beach is NY hype, nice views of the ocean, but can be a hassle, bethel is the best place in the Northeast and Ive been to many different venues for shows in many parts of the country. You should plan a visit next summer