>>>The Catskills dont have blackflies, as such.<<<
maybe not in the valleys... up on the catskill peaks they are out in june - a friend of mine wanted to do friday, balsam cap, rocky & lone one day in june, i took him, all was fine until about 3pm when they started biting - i had a bug net with me... he didn't - the next day he looked like he had chicken pocks, i only had a few on my hands - i have never experienced any black fly problems in the lowlands of the catskill area like you do in the adirondacks (i have a place at about 1000 feet and only have the annoying ones), in the ADKs they start biting around memorial day in the lowlands and end in the high peaks for the first 2 weeks of july - - - but in the higher portions of the catskills they sure do have those bloodthursty little bugs in mid june.