[DPeakMD]

The physical limitations of the size trailer you're considering impose a limit on grey water capacity to say, 20 gallons or less, whether a 70's or a newer model. Depending you your hygienic requirements, if you're staying in one place for awhile, you'll eventually have to dump grey water. It's easier to use a blue-boy than hitching up and moving the trailer to dump. The blue-boys that you can can haul with your tow vehicle are very practical. A 'smallish' 15 gallon full of water weighs over 100#. It's not a glamorous side of trailering, but the blue-boy is a near necessity. We just find room to haul it somewhere in the TV or trailer.