Just got off Deso including the Ouray to Sand Wash section--14 ft raft, a tandem canoe and a ducky.
We launched at the Ouray bridge There supposedly is another launch in the wildlife refuge 6 miles upstream but our shuttle outfit (River Runners transport out of Vernal whom I highly recommend) said with the low water there is a drop off that would make launching difficult. There is a picture of it on the American Whitewater site but its many years old.
The section of the river itself is 30 miles of slow flatwater; we had to paddle fairly constantly to do 2.6 mph and had some wind the first day. The initial scenery is rather stark with low hills which slowly transitions to a steeper canyon. There were a number of cows the first 10 miles including a few dead ones on sandbars but at river level no human activity, machinery, shooting or anything else to intrude on the solitude. Accessible protected campsites seem rather limited. We camped on a sandbar of which there were many at our flow of ~3000 csf it looked like there may have been a few accessible protected benches on either side of the river (left requires Indian permit) around mile 112 on the map but we didn't look closely to be sure.
Is this section worth doing? It depends on why you float rivers I suppose. I liked it --you have the whole river to yourself, great solitude, sense of exploration, doing the John Wesley Powell thing, lots of birds and wildlife, and intense quiet (so skip the motor for sure) and get to experience a wonderful transition into a beautiful canyon.
I certainly would not do it during bug season however
And about the ranger at Sand Wash?--You hear stories about the Sand Wash rangers and you still have to check in and our ranger was quite helpful and congenial. He could have given us all sorts of grief since our canoe was packed more for Missouri beer float than a whitewater wilderness trip but he checked for the required equipment, went over the map with us and send us on our way without a lot of drama.
So in my book it's a worthwhile river experience to do at least once. But that's just me