"Ditto" to the peacefulness, lack of crowds (and bugs), and the beauty of winter scenery. I also find it easier to get around in winter. On snowshoes or skis I can take off in just about any direction and go over terrain that might be impassible, or at least very tedious, the rest of the year. Using a pulk, I can take in a large tent and bulkier winter gear but actually be more comfortable than if I were carrying it in a pack (and, much much faster if on skis). Add to that the ease of making a flat spot for the tent (just stomp one out), and all of the fun things you can build with snow (kitchens, trenches, igloos), and you get an extra layer of creativity and flexibility on campsites.

Now, if we could only just get some snow this year in California... ;-)