I’ve walked around Watson both directions and hiked over it. The terrain going clockwise from their final photo spot all the way around to the final resting spot is not insignificant. It would take a wet and exhausted hiker hours to make the trip. It is no less rough (and in some ways more so) than the stretch on the northwestern side. Not only that, but Trial Lake, Washington Lake and the Crystal Lake TH are all clearly visible from the southern foot of Watson.
Thank you for you sharing your experience hiking that area. Unfortunately I haven't hiked that particular part of the Uintas, so it's interesting to hear about your experiences with the terrain. All I could go by in drawing my suggested possible route was the topo map-- and I tried to draw what I thought would be the path of least resistance if they did indeed go clockwise around Watson from Clyde Lake after leaving the final photo spot.
Just curious, how long did it take you to hike from the last photo spot south to the final resting place? I'm having a hard time believing that Kim and Carole only covered 1 mile after that last photo if they were intentionally going counter-clockwise around Watson. Even if one of them was injured and couldn't walk after that mile, I believe there was likely a good amount of daylight left for the other to go attempt to get help, assuming they hadn't completely lost track of time and didn't leave Hidden Lake until very late in the day.