I went out there several times when I lived in Redmond, and always saw a ton of fish, and fly fishermen slaying! I was usually headed to the res and didn't have my fly set up with me though.
Didn't get on the board till today, sorry. The Fall River, Metolius, Middle D or Upper D have all been fishing pretty good. There is always the Crooked but haven't been there yet this year Let me know how it was?