west yellowstone drive?

I, too, stay at Grizzly. Two blocks from the west gate. If you can, go after school starts in the fall or before summer break in early spring. Fewer visitors, although driving the "Grand Loop" is slow all the time. One lap is about 140 SLOW miles. I allow at least one day for each of the four quadrants. When a herd of bison cross the road, they don't wait for a crossing guard. DO NOT try to drive through them. Those big heads are mostly bone and they can put a large dent in a vehicle and not even feel it. I've seen it happen. And remember that all the critters in the park are wild animals. Don't try to pet them. If you're too far away to get a good picture on your camera, buy a telephoto lens. Now, get out there and have fun.
I never tire of it. My first visit was when I was about 8 years old. That was a long time ago.