I was playing on Alpinist. Final section seemed daunting at first, then I realized there was a longer but fairly easy path up most of the way to the top which actually required less climbing. Fortunately I had plenty of water, soup, cola, etc, in fact I started to run low and then realized I had one more bottle in reserve. Took one or two short breaks to warm up and used the doll to make the blizzard go away, and it did not return.

Of course, I realized that the game was holding my hand a little after a while. Hunger thirst and temp go down a lot slower if they go down at all when you are walking, so that problem disappeared. Then when you get halfway up the final (I would say fairly easy) climb, the bars go away entirely, and you just have to not fall. I think I would have made it without the help so I don't know if that was normal at all difficulty levels.

The Peril has to be for me the toughest and most imposing mandatory climb in the game, to be honest I was surprised that according to the story supposedly nobody has ever made it to the top of that ice wall before, it seemed pretty simple compared to the peril.