The Lower Deschutes evening fishing is damn good, mostly on adult caddis, but on pupa’s and emerging caddis, and Pale Evening Duns. You may also find success swinging Soft Hackles now. 
During the morning and mid-day it is going to be a nymph game with Caddis Pupa (grey 18 and Tan 14-16) and Soft Hackles fished deep, and Perdigons and Mayfly Nymphs (2 Bit Hookers, Micro May and Skinny Nelson’s are all good to try). 
Mix it up with Euro Jig Streamers, Crayfish, Leeches, Minnows, Stonefly Nymphs and don’t always fish the same riffles and try some new stuff and new places.