This campground in Yellowstone National Park has 85 first-come, first-served sites. It was a good base location for us for exploring Yellowstone although there are other campgrounds that will put you closer to geysers, hot springs, and all the beauty of Yellowstone. We had to do more driving but our first priority was getting a campsite; we didn't want to get deeper into the park and hit full csmpgrounds. Plan on an early start for exploring in the summer, because the parking lots can be full by mid-morning .
The appeal for us was that we could get here in 30 minutes from our campground in Grand Teton NP. We arrived around 8 am because we saw on the NPS website for Yellowstone that the campground had filled around 11:30 am the previous two days. You can see the "full" time for the previous day or two for all Yellowstone parks at this link:
https://www.nps.gov/yell/planyourvisit/campgrounds.htm
This is a great feature; these campgrounds fill up daily during the summer.
Our early arrival time gave us a good choice of sites on a Wednesday. On Thursday, people were looking for sites before 7:30 am. The ranger was pulling tags off the sites that indicated a Thursday departure date, but remember that people can decide to pay and stay if they're already on the site. On Saturday, someone was cruising for a site as we were leaving before 7 am. They weren't going to have any problem finding a site because lots of sites are vacated on Saturday.
This campground has the standard amenities for a campground that has no hookups: vault toilets, water spigots for potable water and trash/recycling bins.
Walk in sites W1-W17 (with a specified parking spot for each site) are good tent sites, but so are many of the sites on loops A, B and C. There is also a hiker biker area in the walk in area.
Back in/pull in parking areas are fairly short; length limit is 25 feet. Some have parking areas alongside the road with no demarcation where one ends and the other starts, that is, two sites share a parking area alongside the road. If you have a vehicle and trailer/pop up, you're better off staying away from sites with shared parking. See photos for a trailer and truck sharing a parking area with another vehicle.