Dan, I use the drain and antifreeze method. The drip method will not work when temps get under 15 or so, even if the pipes don’t freeze the drains will as the drips run down the pipe they freeze one on top of the other. The only thing that takes some work is making sure the wh is drained and not filled with AF. the best thing to do is install a crossover pipe between the cold and hot lines at the wh and valving the lines and crossover. I use an air compressor to empty the pipes and “water type fire extinguishers” for filling with af.
Don