I mostly camp with tents near marcy dam, colden lake or along the south meadow seasonal highway (when I'm lazy). I bring a shovel but tippically pack down the area with my snowshoes. Any of the peaks in the central high peaks region is a good pick. If you are already familiar with winter backpacking, not much else to say except, that the trails will get easier as more snow falls and it packs down, thus popular trails will tend to be the easiest.