Howard,
I'm guessing that they are going to be putting grandstands just north of the 18th green in your screencap. When I was there last month, there were bulldozers in that area.
Of course, they also moved the tees on 18 closer to the dunes, and have flattened the old teeing area around the pond. I'm guessing there will be more sky boxes thrown in there as well.
I forgot the exact number, but Kiawah (Mike V) has said that they aren't selling nearly as many tickets as other modern majors, so it won't be like there is 50,000 people crawling all over the dunes like they were in Kohler last year.