We went in the west gate this AM at 8:20. Only stop at was to show drivers license and Old Farts Card. Get in before 9 AM and your good to go. When we went past some of the popular attractions it sure was different to see no tour busses parked. Another thing to remember about late September and early October, not only colder, day light is much shorted, longer dark nights. The Forest service closed Rainbow Point CG today. It was because of grizzly activity. I believe rigs are parked all over the West Yellowstone area.
https://billingsgazette.com/lifestyles/recreation/campground-near-yellowstone-closed-by-grizzlys-presence/article_4127f95f-b051-556e-a9f7-66d6f1cf1612.html#tracking-source=home-top-story-1