There are two schools of thought about traveling with water in your RV fresh water tank; some think, “why carry the additional weight and burn more fuel hauling it? You can always fill up once you reach your destination.” Well, as a pilot I learned early on in my flying that anything behind you, especially a runway, does you no good when you just lost your engine during takeoff. Same holds true for water. Do desert nomads wait or let their camels drink their fill before setting out across the vast empty desert? They let them fill up!