I am somewhat intrigued by Hoosierhacklers' comments regarding runoff. Runoff in the NE part of the park is normal in late-June to mid-July, and since those rivers are not dammed, it can be significant. The bugs at that time of year are normal also. Not sure who would have told you that runoff has been progressively worse as of late, I can't believe that is the case, other than the fact the entire area has been in drought the past 5 years or so. This past year, the snowpack and resulting runoff in June and July were more like non-drought years - or the normal for that area. The fish in the park do not suffer because of the runoff - they've experienced this since before any human went into the park and have done just fine. Whirling disease, non-native species, and too many people fishing do far more damage to the fish than the runoff.