Hi Dave;
Looks like a haven for bugs...
I like the King River best of the 3. The light colored outcropping shore line makes this work (our eyes are drawn to light color on dark backgrounds) the "near-far" works well.
I tweaked a bit: popped the contract, cropped out some of the support element (top & bottom). I think this enhances the "subject a bit more.
I like it....
Looks like a great location. Also a big fan of the King River!
I too like the composition of the King River shot. I do get the feeling that it would have benefitted a bit by the use of a polarising filter to cut down on the glare off the water and increase the saturation of the trees a bit.