Originally Posted by DanNJanice
I think there is a small store south of Moab that lets you dump and fill, I think it is on the southbound side of the road. There is also very good boondocking around Moab if you are feeling adventurous.
That would be the Feed/Farm store south of Moab, on the west side of the road. Last time I was there it cost $5, and there was an honor box to stick your money in if the store is closed, so you can go any time.
Free water is available at the park just on the south side of the Colorado River as you're entering Moab.
Sand Flats camp area is on the southeast side of Moab, up the hill. $10 bucks a night, lots of places to camp, but no utilities at all. This is where the famous (at least to mountain bikers) Slickrock trail is.
Spend some time at Canyonlands NP too. Awesome panoramic view to behold there. And there's a campground there, too. Not sure if it has electric, though.
I've spent a lot of time in the area. I miss it a lot.