Love it! The clickable PDF map is great! Need I say anything more?
There is something else... photographers often concentrate on sunrise/sunset because of shadows/colour. There are many hours in the day and not all parts of parks like Grand Teton National Park will see "good light" at the same hour. Thus it's not just where to park your butt at sunrise and wait but also "if you hike X miles down some trail in mid-July, being at place Y mid-morning/afternoon will...".
If I'm spending a chunk of money on a "holdiay" in Jackson Hole to explore and photograph the Tetons, I want to get the most out of all 12+ hours of daylight, not just 2. Thus if I'm looking to spend money on a photographic guide for a location, it needs to offer a way to fill in most of those hours...