So I fished up there several times in the past month (it is my favorite place to fish), and I have seen everything you have described.
Now I only fish dries when up there (my challenge to myself), so if you want to fish dry flies I would recommend that you downsize your tippet to 6x, and cycle through your flies. Start big with 12 ISOs, down through 14-18 caddis, and finish with 18-22 olives. If you know that you made a good cast with a drag free drift over the rising fish, then switch fly.
I’m not kidding that these are very educated fish. They have been targeted for 7 months now. The cast, mend, drift and fly need to be perfect to get a real bite. Anything less will result in a refusal, which is a positive, but means you need to change fly.
Fish hard and if you catch 1, then celebrate. Toughest fishery in the East!!