I never knew folks were so sensitive to water and different water issues until I joined this Forum. Maybe it's the difference in water quality between home base and different regions when traveling that seems to intensify the issues.
I grew up drinking out of garden hoses, well water that was so mineralized that if you filled a container and waited 15 minutes, you'd have yellow water. Until I became more culturally assimilated I thought that the well water was what good water was supposed to taste like. I never liked "city water".
At my house I have a 260' deep well and an old well fed artesian in the back yard. The latter was the community well for many years and folks used to drive out from the city to grab a few bottles now and then. It had a hand pump but I've converted that to a shallow well system. The well that serves the house (the 260' deep) is always highly mineralized and we use filters and a softener to make household water clean and usable.
For the RV, if I'm taking a longer trip, I'll rinse out the tank with bleach and the house water, then travel to a nearby spring that has the cleanest water around. I pipe a half tank of that into the holding tank. I drink it, cook with it, shower in it, and wash the dishes with it. Actually, I don't do dishes very much....;)