Of course the caveat of this tour is that you have to be staying at Spring Creek Ranch to take it, but if you are, you will not be disappointed! It is also pricey, but if you don't get to this area often it's worth the extra expense. Louise was our guide and she was friendly + knowledgeable. She picked us up at our door, and then we stopped by the front lobby to get coffee & breakfast to go, which was included.
We did the dawn half day Tetons tour, which was a nice introduction to the park. We saw 11 different types of wildlife on the tour, and Louise also provided us some insider tips for both the Tetons & Yellowstone, which proved to be spot on and helpful for the rest of the trip. Binoculars were provided as well as a wildlife sheet.
The other highlight of the tour was that my wife and I were the only two people on the tour! Every other tour we saw out and about was packed with people, so this experience was very personalized.