We're assuming a lot here on Cottonwood depending on what your SUV is and ground clearance. With several of these launches, it can be a ways out to the water across a bar, and the next time you visit it's right next to the road.
I would seriously suggest you take a scouting run the evening before you plan to launch/takeout. You should always be prepared with 75' of rope, and launches like Oxbow are no longer a challenge.