Keeping hands dry in winter

One of the things I didn't like about snow camping last year was that I couldn't for the life of me figure out a way to keep my hands dry. The rest of me was fine, but by morning all my gloves were soaked, so I resorted to just bringing lots of pairs of gloves.

I tried 'waterproof' gloves and 'waterpoorf' mitts. I understand the seams are likely the weak point. Is it worth the effort to seam seal my OR Snowline mitts, or is there just no such thing as truly waterproof handwear?

I've been looking at the MLD Event mitts, and while not put off by the price, the durability gives me pause.

How do other snowcampers keep there hands dry?