As far as replenishing fresh water, we use a water bladder that holds 45 gallons. It lays in the truck bed to fill at the closest facility and transport home, and we pump the water into the fresh water tank using our water pump by reversing a valve. The bladder looks rather like a water bed mattress, but very small. I think we bought it from Camping World.
Recycling grey water is done in some homes; haven't seen it in trailers. Most systems just use the grey for toilet flushing and watering the lawn, but some are more extensively filtered. This could be the trickiest part of the bathroom trailer. Otherwise, you're probably stuck with a lot of blue boy action...
Sherry
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