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!
60 gallon fresh, 30 grey, and 25 black lasts us a week if we're careful with water use. That includes daily navy showers for each of us. We do have and use the third valve that SDcampowneroperator mentioned to equalize our waste tanks if needed.