I just listed a very nice house in Chocorua Ski & Beach Club in Tamworth, NH. You can see the listing here. Ski and Beach has some of the best neighborhood amenities around! There is a beautiful beach on Moore's Pond, playground, a basketball court, a tennis court, and direct snowmobile access (from your door - no need for a trailer) to Corridor 19, which is a major network of trails.
Here is a quick look at the beach & playground: