Watch out for quickmud! and the water IS drinkable.... under extreme duress, by letting it settle overnight in a cooking pot and then treating it as normal (iodine,murine,filter, etc...)
...gotta love NOLS. By the end of that trip I also was scooping water out of shallow sandstone potholes with my nalgene lid. Cause it was the only water around...
Robber's Roost is a cool side canyon. Thats a big one. We hiked over a hundred miles in 26 days, but I dont remember many of the names. full on canyoneering and slickrock like you're on mars in many of the side canyons.
have fun! Be safe!