If you happen to be interested in a Christian camp, you can check out Camp Brookwoods (boys) and Deer Run (girls). They are part of the same 500 acre facility with a nice location on Chestnut Cove on Lake Winnipesaukee in Alton. All the outdoor/ lakefront activities you would probably expect from a camp up here but also things like daily Bible studies with your cabin-mates. My daughter went there for 3 years (between ages 11 and 14) and loved it. Their website -
www.brookwoods.org - has a lot of info you can check out if you are interested. Good luck in your search.