We got through it fine. My little girls and I did indeed have to drag our scruffy selves to Mom's to take showers and just as I was about to get in I got the call that the water was back. Our Christmas Eve party was delayed a bit but we pulled it out and had a great time.
The kids were ready to lose the lights and the heat too. I did allow them to lose the lights but we kept the heat -- and the tree - on.