What a great post, and perfect timing!
I'm going to be in the small town of Rosco NY, not far from the Catskill Fly Fishing Center & Museum, the Beaverkill and the Willowemoc at the end June. Unfortunately, just for a few days with cousins, but I'll be able to get out on the water for at least one of those days.
Was hoping someone can offer suggestions as to the type of flies I should have, access areas and any other useful tidbits one might share. You certainly sound like you have plenty of info from what I have read.
Can you help me maximize and enjoy my one day? As always, your help is appreciated.