Howdy John,
For our trip there we used this book, although a little out dated, the sites and places are still right on the money. We found that the timing it listed for the different animals was very accurate.
I am not sure if you have time or not, but I would highly recommend trying a couple of days at the very least for the Teton's. I was very impressed with all the photo ops there, even more so than Yellowstone, especially for wildlife and water fowl like the Trumpter Swans.
http://www.phototravel.com/yellow.htm
If your intersted in the Tetons at all let me know, I have a couple of pretty good websites.
I am really envious of you, it was one of our favorite trips.
One tip I might throw out is staying in West Yellowstone if your up in the Northern Part. We stayed at the Gray Wolf Inn, it was right across the street from the Grizzly bear and Wolf sanctuary, a lot of good photo ops of them and it's also very interesting to see them that close up, and they cycle the bears in about a every hour to keep them moving and interested. Just something to consider!!!