The Cascade Corner is starting to come around. Flows on the Fall and other waters in the Corner are dropping down to fishable levels. It always seems like it takes a long time for this area to clear!
Look for some caddis in the afternoons and evenings. Drifting pupae throughout the day is not a bad idea. There is a chance you could run into some midges and PMDs as well. Nymphs such as princes, pheasant tails and the like are always good to bring along.
The Cascade Corner is only going to get better.