Just drained my little pond, packed up the pump and packed the roots of my lilies in mud and placed them in the basement for winter.
Sometimes the lilies make it through the winter in the basement OK, and other times they haven't - usually as a result of my forgetting to keep the cloth cover damp and yet allow enough air in.
If it would be deep enough, I'd just let them over-winter in the pond, but if I leave it it just ices right through.
Have tried the local stores looking for a solar fountain for next spring, but no luck.