If you are going to hike, please remember to take bear spray. You might already know this, but just thought I would add my $.02. Are you dry-camping in Grand Teton? If so, get there around 9:30 to 11:00 as that is when everybody, who are leaving, is checking out and you can pretty much get your choice of spots. Lots to do in Grand Teton, not as much as Yellowstone, but still plenty. Cruise boats on Jackson Lake, lunch and dinner cruises as well. Go over to Jenny Lake and either hike or cruise to Hidden Falls and Inspiration Point, then over to Moose and the Moose-Wilson road to the Laurence Rockefeller Reserve with a very gentle hike to Phelps Lake, the site of the Rockefeller compound in this, the newest, part of Grand Teton. Also you can go to the Gros Ventre area and see one of the largest landslides in the continental United States that formed a lake. Also Two Ocean Lake with hiking and the wilderness area. There aren't as many sites to see in Grand Teton as there are in Yellowstone, but they are majestic, especially the Tetons, Mt. Moran, from the deck of a boat on the lake right at the base of it looking almost straight up about 6,000 or so feet. Enjoy your trip and you will never forget it.