Hiking south on the LT this year, one of my few non-shelter camping locales was by Bully Brook. It lies .7 mile south of Rt. 140 but it doesn't seem close to the road. Didn't hear any traffic (probably because of the brook's babbling and the intervening knob which makes the hike harder than most weekender partiers would want). There's space for about 3 tents. Good water from the brook (and a good footsoak).