Thanks for all the tips so far, I appreciate it.
Mike, the comment about NOT towing with water/waste, is this for handling/load shifting concerns? Hadn’t thought about it, but it makes sense. Should just require a little extra planning to find somewhere to top off the water tank right before getting to my final destination. Or I can bring a small quantity of store-bought drinking water, then use river/lake water for washing and flushing, but not drinking.