We came here on Monday late afternoon and there were several spots available. We picked a spot where we could take a tiny trail through the brush to the creek that led to the river. Nice looking site/campground. Nice big bear boxes for all our food/scented things. The campgrounds on the East side just inside Yellowstone often said no tents, only hard tops, which made us a little wary staying in our tent (high grizzly and black bears). We were just extra safe never keeping anything scented in our tent even for a minute.
We also looked at Big Game and Elk Creek Campground. Those were nice too, but we ultimately picked this one.