Campgrounds near Yellowstone

We've gone to Yellowstone multiple years in a row in mid September with last year being the worst for crowding. Even the campgrounds outside the park were busy requiring jockeying for a site. For those of you who have visited this year, and familiar with other years, how is the camping situation looking for this year? We're thinking of going again and just want a hint of what to expect. Yea, yea, I know the Delta variant may be pushing people to get back out with their kids instead of having them in school, but around here (western Idaho) most of the schools are in session with just a few having shut down for a week due to an increase in cases. Thanks for sharing any experience you have.