Looks like fun, Charolou is an awesome trail. I did the whole trail from Tucson to Oracle a couple months ago by myself (not the smartest thing I know). Somehow I completely missed the step though, is it off the main trail down one of the washes?
The hardest part I thought was near the beginning as you're climbing up to the gap because those ruts were just so huge, of course the rocky washes are brutal too. And I think you need a 4x4 just to make it up that huge cattle guard right as your going through the gap, that thing is monstrous