Thank you for your feedback and we apologize for any miscommunication as this is a Yellowstone tour, not a combined Grand Teton/Yellowstone tour.
In the tour description it states:
For Tour Dates BEFORE May 13, since the South Entrance is closed, Tours will drive from Jackson to West Yellowstone to enter through the West Gate. Thus, we will not tour through Grand Teton Park from Apr 15-May 12.
The tour pricing for West Yellowstone entrance vs South Yellowstone entrance are the same, since it is a Yellowstone tour. Unfortunately, we are at the mercy of the weather and the national park service dates for opening roads. That is why we are unable to travel through Grand Teton National park prior to the opening by the national park service. Had the roads been open we would have driven through Grand Teton National Park to get to Yellowstone, but the focus of the tour would still be Yellowstone.
We are glad that you were satisfied with your time in Yellowstone and thank you for choosing Yellowstone Day Tours.