Rooster,
I know the feeling. I lost my father almost three weeks ago. He was 91. He too was with hospice care, had to use a walker, had other medical issues. I found him on the floor of his apartment after he had fallen going from the bathroom to his bedroom and broke his other hip (he had already had one hip replacement). He refused to live in an aclf or have a live-in caretaker.
While he was in the hospital, a couple of days before his death, he said he had a talk with his father. My grandfather has been dead for 30+ years.
Very sorry to hear that, my sincere condolences.
My mother is 97 and I know I will walk into that scene some day, although she is very up and about right now.
Sorry to hear about your father, but glad that he had a conservation with your grandfather before passing.