Just remember that your gray and black holding tanks will only hole so much and when full, need to be dumped anyway unless you have sewer hookup right on your site. Nearly all state parks we've been to over the last 52+ years have fresh water available and also have a dump station too. Same for most NP CG's, county or local CG's also. With water hookup at the site with no sewer hookup, the holding tanks will fill so much quicker!
We always travel with full fresh water tanks and empty gray and black tanks and why not? That's why the tanks are there and you simply transfer the fresh water after using to the other 2 tanks and then dump'em! We very seldom stay at full hookup CG's as the sites are almost always tight as heck as it's almost a must for cost to build or for distance to the sewage ponds or public sewer hooking if in a city type area. That's too "trailer parky" like for us or just a mobile home park on a smaller scale. Give us elbow room and nature not a clear view of the RV on either side of us a few feet away or the ones in front or behind us.
Fussy old farts, aren't we?