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!
37 gal tanks, and DW & I can easily go a week on the black tank (but we're gone during the day.) But daily Navy showers for both of us and doing dishes fills the gray tank (and empties the fresh tank) in 2 days.