Nice. I summit'ed on the same day. Came down via the mountaineer's route as well. Iceberg lake was covered with a thin sheet of ice in the morning, but you can make a hole and filter water. Also saw trout on lower boyscout lake.
There was a trickle of rain on the way down for a very brief time but otherwise was good weather. There were rumors of somebody offering free beer at the summit, but I was told I was too late
Here's a 3d image/photosphere of the whitney summit I took when I was up there.
https://www.google.com/maps/views/view/1...=90&fovy=75
