Might be asking for quite a bit there.
You would like someplace to yourself, but produces fish. Hmm.
Might have to give up a bit of one, to get the other.
Anyhow, state park by Pick City is nice, and regardless which way the wind is blowing (and it WILL blow), you can get out of the wind somewhere. And they have a swimming beach. In the fall, there are salmon in the scoria bay area, and also smallies and northern.
If you'd rather get out of the wind, the downstream area is great, has amenities for campers, aside from fishing, and is out of the wind. With the river running high right now though, the beaches have to be gone. They do have a fishing pond down there though, and I believe they still have movies showing on an outdoor screen on Saturday evenings.
If you hit it right, I understand the shorefishing at the south end of the camping loops can be good at night, in the fall.
that's about all I know...