I was extremely happy with West Yellowstone KOA. Grizzly was nice, we've stayed there before, it is right at the entrance in town, but it lacks amenities. The KOA has very large spots, our premier spot had a large concrete patio, concrete lovely table and bench, and an adult double wooden swing. Indoor pool, gym, and away from town quiet location all added to our stay.Six miles from the front gate. I will put in a plug for Big Sky Rentals, they have a service mechanic on site, located across from the West Yellowstone fire station. Our rig had an engine a/c problem, and these guys saved our vacation at a very fare price. We also rented a van from them so that the group from both rigs could travel the park together. If you make it to Jackson, don't miss the Bar-J Chuckwagon dinner and show. Happy Trails.