There is a drainage at the canyon bottom with a couple of leafy trees indicating some permanent water. These sites look approachable but I was too tired to go there this time. There may be a ruins site on the other side of the canyon to the northeast of the trailhead gas plant. Rick says there is one there but I couldn’t spot it for sure from the distance. My total hike took 6:10 hours for about 9 miles. I carried two liters of water and drank it all on a 60 F mid May sunny day.
(On later hikes I visited the sites below the rim and across the canyon that are mentioned here. Use the labels for Mockingbird Mesa to see these posts.)