you can do it in one rappel with a single rope,, but most people use two ropes.. check out the main Teton Owen Spalding route page and it will tell you all the details. If you can't find it let me know!
""There is a race of men that don't fit in,A race that can't stay stillSo they break the hearts of kith and kin And they roam the world at will. They range the field and they rove the flood. And they climb the mountain's crest. Theirs is the curse of gypsy blood. And they don't know how to rest."