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 doubt the veracity of any "gentleman" making claims about wild cutthroat anywhere east of the 105th meridian......
run, do not walk, to the Tidal Potomac Fly Rodders monthly Beer Tie on the second Monday of the month at Whitlow's on Wilson in Clarendon (Arlington, VA) from 7-9 pm. next meeting May 9.
great intro to a simple, effective fly, all tools and materials provided, and a room full of folks who with great advice and encouragement for when you decide to get your own stuff.
Google the group--it's all online except for the second Monday of each month when we put faces to names, tie flies, drink beer, and occasionally support worthy causes.
NVATU also has a Fly of the Month, bring your own tools. meets in Vienna at the fire house the first Thursday.