Personal Experience: First off, they don't call it Hellhole Canyon for nothing. This place is hot (I don't recommend going in the summer) it's filled with ticks, brush which rattlesnakes like to hide in, poison oak and the hike is rather bland. Don't go unless you're really interested in finding these homes because the hike is not that fun! And please come prepared with a lot of water, food (in case you get lost) and all other proper safety gear for hikes that can go bad.
With that said, this literally appears to be an abandoned commune. There are children's rooms with drawings on the walls, kitchens with pots, pans and canned food, letters, a well, work station and SO much more!