For Monument Valley, no doubt that the
Tribal campground has a spectacular view. I couldn't find a price on the website. If the $42/night listed on
RV Park Reviews is correct, that is pretty pricey for dry camping. As mentioned Gouldings is the closest commercial RV Park. There is dry camping at
Goosenecks State Park for $10. There are a number of boondocking opportunities in the Valley of the Goods that you can read about
here. There is one RV park in Mexican Hat and three in Bluff.
In Moab, in addition to Dead Horse Point State Park and the campgrounds in Arches and Canyonlands, there are a number of RV parks in Moab. There are also
BLM campgrounds along the Colorado River and
boondocking opportunities.
Hope you have a Great Time!!!