The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
I never found separating Ceratopsyche and Hydropsyche adults difficult, especially in the west.
The small black part I was hoping to see a better view of is the tip of the aedeagus. This is often black in many of the Hydropsyche scalaris group, and has a distinctive shape
A good view of the mesoscutum would indeed help with a family determination, however, this structure is located dorsally and not visible in the picture.
But presence/absence of a foreleg spur won't get you to genus.
I wonder too, Spence, if there were Flox flowering in the shady groves streamside?