Bringing extra fresh water.

I you are going to tow a trailer then toting extra water might make sense. Personally I have learned how to camp and use minimal water. My typical camping trip involves hiking often in the heat. I take a daily hot shower. I manage that with about 1 gallon of water: wet down, soap up, rinse off. I use 2 more gallons a day for drinking, cooking and dish washing. I could probably cut back a tad with disposable plates and plastic ware but I rarely bother. Three gallons a day will get me about 10 days of camping. If my wife is along, we use another 2 gallons a day bringing the 30 gallon tank down to 5-6 days of camping.