Timing has a lot to do with catch rates, but you also target areas that get plenty of press (see this and other threads). I’m not critical of you naming a stream as both are pretty large and have lots of water, but it IS Whitewater….. .
If you are looking for your catch rates to go up, the Light hendrickson hatch will be shortly arriving in the WW. I ran into it in Houston County yesterday http://ontheflyguiding.com/client_photo_gallery_2006.htm – pan all the way to the bottom for yesterday’s pics. that typically is a noon (when it’s warm) to sunset hatch with hatching and spinner fall. You may have to adjust your hours a bit.
Plus, what are you using for flies?? We caught fish on about 16 different dries, nymphs, and emergers yesterday depending upon time of day, what we were seeing, plus pumping a few fish to see what they were doing.
D.A.