There is an excellent stretch below Possum Kingdom Lake for about 20 miles, allowing you to take out at Rochelle's Canoe Rentals. It's the most scenic stretch with mountains and large rocks and has many camping spots. We typically do the 20 miles in 3 days/2 nights. Rochelle's provides shuttles. The current river flow is 90-100 cf/s, making for pretty good conditions, it'll just be hot.