I'm 26 now but back when I was growing up I went to a place in Center Harbor/ Sandwich area that was called "Camp Harmony". Also been called Camp Quinebarge. They did all sorts of things at the camp. Swimming, archery, high ropes course, smaller activities at different buildings, etc.
They also had a program for older kids/teenagers called "teen trails". Those would leave for a week and just go and have a bunch of outdoor activities. White water canoeing, hiking, rock climbing, etc. Then would take a trip down to hampton beach for a day. We would sleep in tents at different campgrounds around new hampshire. They provided everything needed. For the week.
I had gone to the camp harmony first cuz I was still young and then when old enough had done the teen trails.
http://www.insidecamps.com/review/ca...arge-1099.html
http://www.campquinebarge.com/
Hope this information is/was helpful.
J4K