Hey, Munsiyari is ideal to travel in winter as it will be covered with snow sheets.. No hassle driving there as roads are well maintained and safe too. I might plan for Himachal somewhere in December as well. happy travelling!!!
It's a good option if you love winters, but the road conditions were bad and dangerous at that time. because its covered with snow, I've travelled there first week of January. and the day visited, we able to see snowfall.