I haven’t put my two cents worth on this thread. Though I suspect what I say will be ignored just as the comments by all the real experts, here’s my two cents.
In 1998, the last heavy snow year, I did a 38 day solo trip. I left on August 4. Every pass and the approaches to the passes were under deep snow. These were passes with trails. Below is a link to a photo from Muir Pass taken on August 13. The snow began below Wanda Lake. Cross-country routes that year were a lot worse. There was a nasty cornice at Shout of Relief Pass; I’d already decided not to do it by that point. I ran into one guy on Pinchot Pass who had gone over the Potluck, Cirque Pass route. He had an ice axe and said it had been an experience he didn’t wish to repeat. I was considering going through Ionian Basin. I checked in at the LeConte ranger station with George Durkee (thanks for the great help and advice, George). Rob Hayden, the Evolution Valley ranger, was there after having gone through Ionian Basin the day before. He said the snow coverage was at least 60%. This was on August 24. This year the conditions will probably be similar. You say you are still planning to leave on June 26? I wish you the best, but as George Durkee said, this year may not be the year for doing the trip you've outlined.http://www.sonic.net/~words/Images/Muir ... wnorth.jpg
Yes, that's ice on Wanda Lake.