Re: dry fly presentation?
Don't beat yourself up too badly, that part of the river gets pounded, even more so now that the Green Drakes started a few days ago. Fish become wary and have seen many a fly, so fishing gets tougher. This is all part of your learning.
I agree with the thought from above that if you don't see fish actively rising, then stay with a nymph (or even an emerger fished down in the water column). And once you do see fish rising you have to decide if they are eating emergers just under/or in the surface film or if they are eating adults? OR something all together different. Once you have made a decision....fish to the fish, don't cast randomly in hopes of catching the odd fish unless you just want casting practice.
You didn't mention what flies you tried?
"Whoever said happiness comes with sunshine, has never known a Steelhead fisherman who prays for Fall rains."