Oh, so that's what happened. Then this photo must be from Saturday, April 17. On Sunday the 18th I found about 18 inches of uncohesive snow on top of a solid melt-freeze crust. On this slope angle I wouldn't be concerned about a loose slough unless sun warming caused free water to penetrate the new layer. We were in a cloud cap on Sunday, so that wasn't an issue.
Thanks. It looked like the right side (icier and in the shade) would have been safer, but I decided it was a good day to live and turned back. Sometimes it's the journey that matters, not the destination :)