PM me. Weather permitting I will be fishing the WH area this Sunday, Perhaps we can meet. Otherwise, try streamers/buggers with alot of natural action yellow, white, olive or peacock, black all with a little bit of flash should work.
Try swing through deeper runs,
If you are into nymphing stay with dark colored nymphs in 14-16 range. Zug Bug, prince, dark hares ears, olive PT's and March Browns in #12(I know its not the time but the MB nymph looks close enought to alot of critters in the river ie stone fly, hellgramite, mayfly, and others). Also green or greyish tan caddis larvae in 14-16.
Dryfly action is hit and miss now. Smallish Iso's in 14 and 16, BWO 14 and 16, and your guess as to what color caddis are all possibities, though green and tan are most common.
When in doubt #12 Royal wulff, #16 Adams, and #14 Stimulator are good bets.
I tend to stay away from the classic dry fly areas ie flats. I pay most of my attention to riffs, runs, seams and deeper pockets behind rocks and shaded areas. FISH THE FOAM LINES
hope this helps