I will tell you two things he did right, built a cave and stayed in one spot.
Thank you for that little bit of information. I have hiked that area over a 100 times and I had made two guesses as to where he was.....the second guess was the correct one. Here is the Castle Peak ridge that is the dominating landmark from where the Peter Grub hut is (photo was taken "across the street" at Boreal Ridge where I am a Pass holder)

B