My 2693RD has 36 fresh 30 black and 16 gray.
wash the dishes in a tub and dump in the toilet, the fire ring or the dish washing sink at the bath house, it seems to conserve water. I bought a blue tote that I take along. If you want to boondock it will ba a problem though, I'm planning to add another fifteen gallons to mine in a seperate tank, there is room underneath for it.