Have done that road several times (not in a TT) and it is one of the most beautiful and spectacular drives in America. That said, the road, to me, is pretty twisty in spots, and there are some sharp turns. The last time I was on it was on a motorcycle at midnight at the top
. Was real easy to overrun the headlight on the sharp turns as they dropped away left and right, so maybe I am remembering it to be scarier than it is. I would think that some of the turns would for sure require the whole road for a 30 foot TT. I would bet that others have done it though
so maybe they will chime in here.....