We were nervous about trying to find a campground in Yellowstone without a reservation as all the reviews made it seem impossible, but as we pulled into Indian Creek we were pleasantly surprised to find a first come - first served campground with almost nobody there on a Friday afternoon. The hosts were extremely helpful and asked about our site preferences before assigning us a spot. This was a great base camp to explore the park for the day and had food storage, picnic tables and fire rings at every site. There are also bathrooms, trash / recycling at the entrance and firewood for sale.