I doubt very much there's any campgrounds open in New England during the winter months. Water/sewer freezeups being the biggest challenge to cg owners. Besides, many of them go to Florida until it gets warm enough to go back to clean up the winter debris in their parks.
You might try calling some of the ski resorts themselves to see if they allow dry camping in their parking areas or some other more remote place. They may just accomodate you, but don't expect hookups.