Yellowstone

Ranger Smith wrote:
Yellowstone has a major forest fire going through it now

That is why it is important to monitor what is going on in the park and surrounding areas. With fires, things can change overnight. Yellowstone fores

We went to Yellowstone last September/October and planned to head south to see the Grand Tetons. The smoke from the fires was so bad that we could not see the mountains at all.
Here was our view of the Grand Tetons looking across Jackson Lake from US191:

we stayed at fishing bridge and took the toad around the park. I wouldn't uproot myself every couple of days myself.
bumpy

Yellowstone has a major forest fire going through it now

Here's the national park's website and it lists the campgrounds and closing dates. Mammoth is open year-round.

If you look in the far left column you will see a heading "Things To Do". Perhaps this will help you.

Yellowstone Campgrounds & Closing Times

We stayed in West Yellowstone at Grizzly RV Park, then drove into the park daily. http://www.grizzlyrv.com/

Some of the campgrounds close in September, so that tells you that things slow down, a little. The one time we stayed in the park, we stayed at Bridge Bay and they closed a good part of the CG, this was in early September. Other times we've stayed outside the park in West Yellowstone at Baker's Hole, a FS CG 2 miles North of West Yellowstone. Another time we stayed near Henry's Lake at Red Rock RV Park but that was too far out for us. And yet other times we stayed at Flagg Ranch and Colter Bay, but both of these made for a long day, but we didn't mind the driving, but that's just us. I say to see the main highlights first time around, then hit the less traveled spots later or another trip. You can always, in the course of your drives, check out other CG's, then move there for a change.

Stay at the Grizzly RV Park in West Yellowstone. Drive the car through the park and/or take the Yellow Bus Tours.