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!
My wife and I put 3 1/2 gallons in the black tank each day and 10 gallons of gray water in the gray tank each day. This is when only one of us takes a shower each day. We could use a little less gray water by putting a plastic tub in each side of the sink when washing dishes and dumping that outside (where allowed).