You are obviously going to find every possible variation of personal opinions and practices about the fresh water tank. Here is another:
+ I always drain the fresh water tank when we return from a trip, unless we have another trip planned in a few weeks.
+ I never fill the fresh water tank completely. I travel with the tank between 1/3 and 1/2 full for a long trip. That has proven sufficient and I see no reason to carry extra weight. If we go to a campground without water hook-up, we have always been able to add water to the tank before arrival.
There you have it--another opinion and practice.
