The Crooked River is a blast. PMD Hatch is the primary dry fly action and it has been common to see them pop late morning and mid afternoon. The Sparkle Dun #16, Extended Body PMD #16-18, Quigley Half Dun and Film Critic #16 are great. With some BWO’s add a Furminsky’s BDE Dun #18 and a Knock Down Dun and Film Critic too and as September is here, don’t be without a Mahogany Dun on any of the rivers for the next month. Mahogany Duns are relatives of the PMD’s (crawler nymph family) and hatch in the fall on all the local rivers. A Purple Haze or Comparadun is great, another favorite is a fly called an Upright Rusty Spinner and the old Quill Gordon. 
On the nymph side, the brown perdigons and micro may’s are killing it. Add a Fire Starter Jig and a Spanish Bullet to that mix and some Scuds, Zebra’s and Midge Winkers along with a BWO Micro Mayfly and you will be set over there.