I'm thinking y'all are right with this scenario.
The risk of all this is driving me crazy!
A HUGE problem in all of this is that ED had had a good experience bivouac-ing (no tent and no bivvy bag, in her case) a few nights before, even though it was expressly beyond her comfort level. With the sunshine and all, she could have been lulled into thinking she could do it all again.
So not smart to continue past the Refuge, even if she had to hang out. She could have spent the time getting water, getting rehydrated, making cups of tea, staying warm, gathering firewood, doing yoga, getting a fire going, doing Sudokus, reading a book, sitting on the doorstep looking at stars.... If all this was "beyond her comfort level", at least there was no risk in it.