Redcone got a really bad rep back in the day. It was a real bitch. It was covered with scree that was many feet deep. You had to straddle the knife edge and you virtually slid to the bottom. At least one Jeep went over and killed the driver.
About 10 or so years ago, they bladed the thing down in order to take big geophysical trucks up for testing. It is nothing to worry about now as long as you keep it in 4low and go slow. In the past the trail was downhill only because it was so tough and is still one way, but I would have no problem going up it.
This is one of my favorite trails, but I miss the challenge.
Take some salted sunflower seeds to feed the sheep.