I have been to several of the NSSHP's, and the best place is in frontier land. I would recommend staying on the side of the street away from the water. You can stay near the river, but you have to be careful becuase there are lights that will shine almost directly into your FOV. It is fairly dark, and there will LOTS of people, so go early to the parade route and get setup.
Once they put the ropes up prior to the parade, we actually pulled some benches right up to the ropes and were able to sit for the entire parade.
I will look and see if I have any pictures that you can use as intel.
As you can see, the orange light shown directly into our eyes the whole time.
This is the main reason I suggest going to the other side of the street.
Even though they came out ok, I had a hard time compensating for the subjects being backlit, and I have to admit, my camera is ok but not great. Sux not having a good camera.
Hope this helps,
10ded