The Wandering Wagners brought up this topic and I thought I would bring it over here. The question is do you travel with your water tank full or empty. I travel with mine with water in it for two reasons. One is that in an emergency if you need water, You Need Water. The second reason is that I run at about 55% towing capacity and my rig doesn’t even notice whether it is full or empty. Plus then if I have to make a potty stop we can flush the toilet.