Hi Tripalot. X2 on campgroud inside Black Canyon of the Gunnison NP. Only has vault toilets but we enjoyed the atmosphere. Numerous overlooks as you drive the canyon rim.
Another option for Ouray is 4J + 1 right in town along the river. We spent a weekend there walking up to the box canyon - well worth it - and strolling into town to shops and restaurants.
You mentioned Grand Junction. Allow at least two days there. Colorado National Monument is stunning, and you are overlooking the city from up there. A big surprise for us was the number of wineries on the outskirts of GJ. They welcome visitors, and it reminded me of visiting Napa Valley in the 1970s.
An ideal place to stay for GJ area is the James M. Robb CO River campground in Fruita. Very nice, fills up.