We've seen there is a huge pent up demand for travel out there. If you are thinking of a trip to Yellowstone in 2022, today might be a good day to make reservations online.
https://www.yellowstonenationalparklodges.com/
One tip: When I used my senior pass discount code, very limited offerrings were available on campgrounds. When I removed the discount code, all campgrounds became available.