Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
I have thought of a "nickel bag" (Spence showing his age here) of medicinal pot...Maybe if I increase the "buzz" I just won't care...:)
I'm still kicking around the contact-paper-on-the-hat idea. Might look silly but might just work too.
A few years ago, several Ohio State University Extension agents field tested TRED-NOT DEER FLY PATCHES as a non-chemical control method. Some reported good results of these odorless, non-chemical, adhesive patches. The patches are three inches wide by six inches long, and are worn on the back of a cap to trap and hold biting deer flies. Patches worked best when moving.
Back when I was a little tike folks were fond of those "fly-paper" strips...
Hanging at Grandma's kitchen up near Cadillac MI, it was an appetite killer, seeing all those poor souls stuck up there dangling just yards from the kitchen table...Stuck...But not quite dead...Yum!
Spence