When I did this loop in july (begining) I set up camp. Just before # 3 + 4. There were some good spots right before that. Guessing only a few miles in. One site was basic site for 2 or 3 but the next one to it could hold a few more easily. But that's just what I can remember and it was right on the river. Fwiw.
It's not the boulders that throw us off balance, it's the pebbles beneath our feet