The Crooked River is fishing quite well. Water levels came up 110 cfs this week, which is a big surprise seeing it at nearly 300 cfs now. I recommend cleats and a wading staff to navigate the river and the slick rocks. 
From what I hear from the guides and our friends (like Capt. Drew) there is very little dry fly action now, but the nymph fishing is solid. Perdigons, frenchie, eggs, zebra midge, split case PMD, scuds and Ray Charles. 
If you want to throw dries, maybe as a dry dropper I have some thoughts: 1) this should be prime PMD hatch time, so are they going to hatch? is it late? will today be the day? carry PMD’s. 2) Purple Haze, renegades, Larimer’s Yellow Sally, X Caddis are all summer time dries I trust on the Crooked, and should work at some point at least for a few fish. If it’s a numbers game for you, the nymph is the better choice.