If I remember correctly we stopped at the RV park that was fairly close for water. No water here at all.

We stayed on the Long Jim Loop early/mid March 2022. No water on the loop. But we dumped and filled water at the Grand Canyon Camper Village. It was a private RV park on the NE end of Tusayan. I am sure we paid for the service but I don't remember how much.

There is an RV park close to the Long Jim site right on the main road to the park. Very convenient.

We used the facilities at the park. As long as you have a park pass, there is free water and dump station. There is also coin op laundry at the same location. Maybe 5 miles.

There is a full service campground on the left in town.

There’s a dump station inside the park that’s easily accessible. We used that.