They pick a national forest to visit every year, this year its the Whites, specifically in the block of the forest called the Kilkenny's. The forest service is not happy as the group is not willing to fill out any permits or commit to any special planning. The expected crowd is 5 to 10 thousand people for a week starting July 1st to the 7th although preliminary groups have already been starting to show up. Various volunteers attempt to minimize the impact of the event by setting up latrines and water supplies in advance. They have been doing these events around the country for 50 years on national forest lands so the government ships in staff from around the country to try to minimize impact. The PR on the event is definitely bi-polar, either speaking of these events in glowing terms or making them sound like its a hippie invasion.
Getting to it from the AT is not easy, It can be done by heading North from the Northern Presidentials and then down to the Appalachia parking lot and taking a combination of local trails in the Randolph Area to connect up with trails to Pond of Safety and then north along a snowmachine trail to the location. Probably a long days hike for most.