I hiked most of the TYT last July, based upon a plan to complete it in 11 days. Unfortunately, due to hiking companions’ injuries I had to bail at Lake Alpine, 72 miles from Meeks Bay. Later in the summer, I hiked the 40 miles from Lake Alpine to Kennedy Meadows.
Based upon my experience, I would recommend you allocate extra time for the stretch through the Mokelumne Wilderness (between hwy 88 and hwy 4), since the trails there were often extremely faint. Thomas’s advice to skip this section of the TYT and choose the PCT instead would definitely increase your efficiency. However, I really enjoyed this part of the TYT, esp through the Mokelumne canyon.
Wayfinding elsewhere was more or less straightforward, and would permit 20+ mile days.
Your gearlist looks pretty solid. I would say you can skip the rain pants, since rain is pretty infrequent in the Sierra at that time of year. In my eighteen days hiking there last summer, I never experienced rain. Afternoon thunderstorms can get u wet, but in my opinion it’s hardly worth it to bring and put on rain pants just for this. I would personally bring warmer tights for the nights, but I have no idea how warm those 1.5 oz Sahalie tights are. Don’t forget the DEET…
We used an Ursack (sans liner, always tied to a tree) and Bear Vault, neither of which were disturbed.
I recommend you have a look at this trip report, which I found very useful for trip planning: http://www.longtrails.com/tyt/
Best of luck on your hike.

