Interesting to see your pics. It would have been somewhere around 1988 for me, too, when I hiked down and back up on the South Kaibab Trail in one day with my parents and brother. That's something that I've noticed in recent years the National Park Service doesn't recommend that anyone should do in one day.

We started hiking in the middle of the night while it was below freezing. By the time we got back to the top, it was 107 degrees. We brought 5 quarts of water per person and could have used more. I still sometimes think about that trip when I wonder if I have brought enough water along somewhere.