Regarding water quality/safety for your RV from unknown sources - you might want to consider carrying disinfecting Clorox ("regular" Clorox, with no laundry "additives" in it) along in the RV.
Check on the Internet to determine how much Clorox to add for disinfecting (not shocking the tank ... just disinfecting it) the size FW tank in your RV. Before putting the campground water into your FW tank, just measure out the oz. of Clorox required for the size of the tank and put that amount of Clorox into the tank inlet with a small measuring cup and funnel. By getting the amount just right, the water is safe and has very, very little - or no - chlorine taste or smell to it.
Doing this will ensure that the whole FW system (tank plus lines) in the RV stays safe to drink from, which is a good practice whether you drink out of the tank or not. If you do drink out of the RV's FW tank, by getting the amouunt of Clorox just right, the water will be both safe and have very, very little - or no - chlorine smell or taste to it.
For decades, we have been using this same method for the large FW storage tank that supplies our home from our well and spring.
2005 E450 Itasca 24V Class C