Just some side observations on my visit to Yellowstone and Grand Teton NPs; these two National Parks are adjacent to each other and huge by any standard. Each would warrant at least a week’s stay to explore their major features. If you should visit Grand Teton, I suggest you make it a point to visit the Craig Thomas Visitor and Interpretive Centre. It is one of the best I have visited in western United States. This is a large facility with cavernous ceiling and high-tech interpretive displays. One side of the centre is glazed and facing the Teton Range. It is a photographer’s delight and I am quite sure your family would enjoy the place too.