Glad to hear your trip was successful!

To keep my face warm I use either a balaclava (homemade of poly fleece) over a wool cap (I use a quilt, so I have no sleeping bag hood) or if it is not so cold, a wool buff worn like a hood. I use the 'clava over the cap so the cap does not scoot off my head at night.
I pull the cap down to the end of my nose and pull the balaclava up just under my nose. Yeah, I can't see, but my eyes are shut anyway.

This was a backpacking trip, but you can see what I mean. My eyes are uncovered since I was fooling around with the camera.