Not sure what you mean by drakes. But I've seen hexes flying around Pirate games at this time of year - from the allegheny river there.
And that would be my guess on the mon too.
I am a graduate of Cal U. I had Dr Kimmel as my invertebrate zoology professor. He was an excellent teacher. I did not fish during my college years. Took up fly fishing in my mid 20's. Dr. Kiimmel fished the Little J. Good to see it is improving.