The hex hatch is still going on the mainstream above Camp 10 Bridge, but pretty well done below McKinley Bridge.  There is a good chance it will be done by the end of this week.  Isonychias, light cahills, and pheasant tail nymphs are all good choices on the river now.  This is also a good time for standards like Adams, Borchers, and Wulffs.
Keep an eye on the water temperature, as it is rising.