Just did it! Awesome, and scariest 11 miles I've ever ridden. My advice is go in the morning, or after 5. We did 2 runs in the morning, around 8am, and had the road to ourselves. Then we did a couple of other roads, came back to eat lunch at the gift shop at the start of the dragon, and watched ads LITERALLY hundreds of harleys rode in, one after another, for 3 or 4 hours straight. We saw one group of 40-50 harleys! These guys ride SLOW! I mean, we followed a group of harleys on another area road. The speed limit was 50. They were doing 30! Not 30 mph on the turns, but 30 in the straights. I kid you not. Some locals said that after 5, the road is completely open.
Oh, and LEO were at the beginning and end of the 11 mile run, so watch your speed entering and exiting. Should be safe on the run itself, though.
Here're some pics. I didn't push myself since I didn't want to be "yet another guy" who laid it down on the dragon.