It has already been mentioned, but tripod mounted binos 10x minimum are a game changer. Bring some Dawn dish soap to get the poison oak off your hands regularly.
I was there this year the last week of August. The Kuiu 97 zip off bottoms were indispensable under a pair of Talus pants. Puffy jacket with me at all times. Puffy pants would have been a luxury, but not certain how much I would have used them. I kept a pair of 210 zip offs at spike camp...