Wally 13,
If you don't want to kill yourself getting to Kawnipi in one day, or there are issues either with wind or ???, there are a couple of sites below the 3rd falls after Saganagons. One is on river left next to the falls. I have seen people camped there but have not looked at the site. Right below that on a small island on river right is a nice small site that I have stayed at a couple of times. Nice place for a small ( 2 tent max ) group. I have also seen people camped on the larger Is on that lake as well.
Good luck.
Gene M