Nobody here has mentioned a real big issue.
If your RV has a problem and there is a virtually unlimited supply of water, it can all end up on your floor. And, that will be after the black and gray tanks overflow. So, unless you leave the dumps open all the time, that is a real risk.
It is also my personal point of view that if you are at even a WE site (let alone FHU) you are not even close to "Camping". If you choose to go RVing or Glamping, that is fine with me, but I have been camping and am just too old to go that anymore.
The both of us can get by for 3~4 days on the coach's 30 gallon water tank. When that gets low, we also need to find a dump, so that works for me.
Matt