Thinking of putting in larger fresh water tank

I'm 36/30/30. I state park camp and usually get it to late Saturday night if full showers and dishwashing occurs. I have a poop cannon to 25 gallon gray/black tank in back of my sub. Dump it from back of sub


You could rig a fresh water setup easily as well. Rig up a portable fresh water the same. I use a jump box to alligator connection. Rig up 3 blue aquatainers for a total 57 fresh water/55 gray setup for serious water hogging action