There are a lot of fish, but they are the most active at night when they have the cover of the darkness to move through shallow sections, as soon as the sun starts to rise they find deep holes and hold till night again, with the water being so clear and shallow, the fish become spooked, and reluctant to move off the bottom or attack anything, the fish that you see surfacing are most likely male fish asserting dominance, (and possibly breaking the surface tension in calmer waters to feel more protected) hence why you will see fish surfacing, but not striking. And that is why fishing at first and last light is so effective compaired to mid day.
And has there been any reports from the last few days? My friend has been texting me while he was out there over the weekend, saying its been off and on for the last few days. I'm just curious as to how other people are fairing on the river.