Thanks for the very helpful report, rdev! Great note about the self-issue permits, too.
Your phone may have run out of juice searching for service -- that always drains them. I think I have seen that if you put it on airplane mode (or turn off the cellular access part), they will continue working far longer.
A note on the use of poles and icy stream crossings: What can look like just wet rocks in the stream can actually be glassy-clear solid ice covering a rock. Using hiking poles to cross those places is a really good idea. Several years ago, a group had to turn back at the first stream crossing, after one member did an ugly face-plant caused by wet-looking ice-covered rocks.
