I too am in central NC ..In Jan 2000 we had 26 inches of snow and temperatures in the low teens for a week ...with no power. It was unexpected needless to say. We went out as soon as the power went out and drained the pump and filter, all things that could be drained... and crossed our fingers. THe pool was frozen for about a week, We had no damage to pool or plumbing... Our next door neighbors did the same thing and had no problems.

We have had a few other outages since then but not cold enough to freeze water.