We are hardly ever gone in the winter months for more than two weeks. Even if longer, we'd still set our themostat at 65 degrees. I feel that too low of a setting can effect many things inside, therefore, just don't want to take a chance to cause any damage.
Our temperatures here in Bremerton, WA will seldom go below 30 degrees and that will be during the night for a very short time.
Our RV trip to Alaska