From a trusted source,ofcourse we do and have for over 50 years..Some of the nastiest water out there, is campground water.I never use campground water..PERIOD..I use creek water with a Sawyer water filter,spring water right out of the hillside but never ever campground water..Did I mention campground water can kill you..LOL
I truly do not understand why anyone would buy an Rv and not use all the amnetties...Even a 40 gallon water bladder used for extra water has No taste if properly cleaned just prior to filling..
If you put bad water in a water tank,the water will be bad,if you put good water in a properly cleaned water tank,the water will be good..
Buying a used Rv is always a **** shoot for several things including how the water tank was taken care of..Even though the one I just bought was seldomly used, including the pooper,I have run hundreds of gallons of fresh water through it at home just to make sure and the taste is just as it it out of the "white" RV hose I fill with.No odor or unusual taste..