Camping with full hookups in below freezing weather

how long are you going to be camping in below freezing weather?

If it's just overnight then I would not worry. If it's for several days then that's a different story.

I camp through out the winter in freezing (night only) weather and I do not take any special precautions. Temps get to about 25deg. Occasionally the black/grey tank does freeze but it thaws out during the day or I dump a gallon or two of hot water.