i've been saying the same thing for years as far as the advantages of winter camping.
no bugs
no people
i can regulate my body temp. by layering.in the summer i just sweat.
i use a deer drag harness i bought for 99 cents at gander mtn. and tie that to a sled.100 pounds in a sled is easier than 60 on my back.
not to mention,i think the woods are at their most beautiful when white.
i can also relate to your friend.i can remember those long nights that seem to never end and i will probably have more of them in my future.
some people ask me if im nuts for camping in jan. or feb. when its -0.i tell them its the best if your prepared.
for those who havnt done it,give it a try.just make sure your prepared.