Moab BLM really started cracking down in the mid-aughts and designating dispersed camping to very limited locations. And I have seem them ticket people who try to stealth camp anywhere near roads or trailheads. Considering you will be there during a busy season I would advise caution about camping in any undesignated location, including sleeping on your boat.Special regulations apply for river runners wishing to camp along this section of the river. On river left (to the left as you are facing downstream), camping is allowed only at BLM Utah, Moab Field Office Campgrounds. River runners may camp at designated sites on river right (to the right as you are facing downstream) only between Dewey Bridge and Salt Wash (the boundary of Arches National Park).