we dry camp a lot and often need more water. Solution:
1) install a second water pump in the pass through plumbed to the fresh water inlet with a long extension and dip tube on the inlet side and a power switch
2) fresh water in the blue 7ish gallon water tank
3) insert dip tube, turn on pump, empty tank, repeat.
Most places we dry camp have a water source somewhere, so we just refill the 7 gallon jugs as needed. For the few that don't 4 of the 7 gallon tanks plus the 35 gallons on board will last us for a full stay of a week or more.