Another thing you should be aware of is that the trail around Hetch Hetchy is closed at Wampa Falls right now. The park started doing this during high periods of runoff several years ago (prior to the drought), when some backpackers coming back from a trip after a storm in June made the mistake of trying to cross the three metal bridges in front of the falls even though water was running over thby rgliebe - Backpacking and Hiking Yosemite and the Sierra
The last time I was at LYV was right after Christmas a few years ago in the middle of the drought, and I was shocked at how few bear lockers were left. They have reduced the number of bear lockers substantially and the number of campsites since the century started. You want to get there as early in the day as possible so you can set up your campsite near one of the lockers and get everything wiby rgliebe - Backpacking and Hiking Yosemite and the Sierra
Last year I learned on the Tuolumne River that my La Sportiva GoreTex boots aren't perfectly waterproof anymore. I do highly recommend gaitors for reducing the water coming in from the top and keeping your legs a little warmer during the crossing, so you aren't tempted to rush through a crossing too quickly. If your boots take in water, you will need multiple pairs of dry socks to use unless yby rgliebe - Backpacking and Hiking Yosemite and the Sierra
I've attempted this monster day hike three times, twice without snow, but first time was with snow in late May during a year with slightly less snow than this year. Without snow you need every minute of daylight in June to pull it off and go from the Bridalveil Falls parking lot over to Glacier Point and back down. On those long June days I started at 5:30 am in the morning and barely got downby rgliebe - Backpacking and Hiking Yosemite and the Sierra