Couple winter travel trailering questions.....

Where we live, we experience temps like you in the winter. We almost always have at leas 1 hard freeze each winter. We also use the camper throughout the year. What I do is blow out the lines between each trip and add 1/2 cup of antifreeze to each drain trap. A gallon of anti-freeze usually lasts 2 seasons. It is very cheap insurance.

-Michael