realize it's a function of tank sizes, but how many days between emptying tanks are realistic / typical for 2 persons when "boondocking" (hookups not available)? or maybe a range? thanks!
Our average use is 10G of water between the two of us per day. We have an 80G tank. We can go 7 nights/8 days before needing more water. Our gray and black tanks together hold 90 gallons so we run out of water before our tanks are filled.