We just did 10 days dry camping. We probably would have been able to go another few days without filling the black tank. Surprised the heck out of me. Being in the forest allows the male gender to find a potty tree, as the young ones call them. We didn't flush the liquid until the bowl got close to full. We did flush when solids were deposited into the bowl....great conversation....We have a 40 gallon black and 2 40 gallon gray water tanks. We also have a 50 gallon hard, potable water tank that goes in the rear of the truck behind the aux. fuel tank. We also have a 45 gallon collapsible tank in case we are too far from fresh water. Both are pumped with a 12 volt water pump. We have a 5er. We also have a macerator pump and 35 gallon tote. That's our story and I'm sticking to it.
