I remember the Baker Ranch cabin. Our family had a houseboat bought in 1973 at Bullfrog and we always went to the back of Halls Creek to camp.
Back then as 10 year old kids our dad let us kid take the 14' boat with 20hp Mercury out by ourselves, so we explored that area and hiked everywhere. The cabin was there and we even made a special trip to see the water lapping at its foundation one time. Lots of bluegill were caught there by us in the trees, usually without any bait, just the hook as those fish were hungry.
The family homesteaded 600 acres and even built a dam in Halls, for irrigation water. Also there was a workshop and the foundation might be recognizable still today if you know where to look.
You can still see the fence posts and barb wire around the area in the back of Halls Creek, as the kids and I camped back there two years ago and I saw them.
I believe the family struggled for years and finally gave up, and in turn it was bought by a group of men for a hunting area who in turn sold it to the government/Lake Powell project.
This is all by memory so I hope I got it right.