The Lower Deschutes is transitioned to summer mode with good evening caddis action, especially on warm to hot afternoons that stay warm to sunset. The magic hour. It is real and it is worth waiting for. 
Purple Haze, X Caddis, Fin Fetcher Caddis, Light Cahill, Yellow Para Wulff, Sparkle Dun, Elk Hair Caddis, Rusty Spinners are some good dry flies to play with. 
Throughout the day you can look for risers in the eddies and shadowy banks, but it is best to focus on your nymphing and even small streamers. 
Soft hackles, caddis pupa, PT’s, split case PMD, perdigons, jig napoleon, sculpzilla, squirrel leech, slum lord and mini gulps. The streamers you can tight line with your euro rod set up, or under an indicator, or try a sink tip like the Scientific Anglers Trout Express and swing or strip them. Plus a lot of the FFP guides like to get out the Trout Spey’s this time of year and they frequently run a little sink tip on the end of their skagit heads.