Advantage City Water: Endless supply
Disadvantage City Water: Endless supply
Water may be "Different" from what you are used to.
Water system can "Fail" due to busted main.
Tanked water: Advantage: No intrupption due to freezing of city water hose busted water main Idiot driving over park water pipe and busting the blazes out of it.
For short trips you bring HOME water and your system is used to it.
Special advantage in parts of OConee County. SC.. Pioneer water district over chloronates teh water so it tastes like bleach Even using it to fill the on-board tankj, that taste is cured by letting it sit in the tank for a few mintues.
What does "Different water" do to your system (I mean YOUR system, not the RV's
Well all summer last year I spent using water from a single source, Then I took on 80 gallons the day before Halloween and headed South for the winter. That 80 gallons lasted me till.. Thanksgiving AM. I will admit I use less on-board water when on the road cause I use Rest stops and truck stop toilets but I was only a few days on the road)
Filled up with Pioneer water and went through the same 80 gallons in a week. WHY. Well mostly flushing the flusher.