The Middle Deschutes will see an increase in water flow very soon as NUID and COID are about done providing water to patrons in the irrigation districts. Fishing is still good on the Middle D, but be aware of the upcoming changes and wade safely and watch for a color change and debris starting to float by. I have been there twice when that day happened and it can be a real bummer. Once it stabilized (takes a day or two) fishing is fine. Wading gets harder though in many areas of the Middle D.
Euro nymphing and streamers are very good now and will continue to be for several weeks. Some Dry Fly fishing is to be found, with the PMD’s lingering, BWO’s increasing, Mahogany Duns and Caddis hatches. My 3 favorite Middle D dries are a Purple Haze #14-18, Yellow or Olive Sparkle Dun #16-18, and an X Caddis Tan or Olive #14-18.