Emigrant Springs - Love it!
My husband and I love this campground. It's close to the mountains without being too far away - about an hour and a half from us living in Tri-cities. There are showers and water spickets, room for horses, and great hiking trails. There is room for both tent and RV camping. We have only ever gone tent camping, and the size of the campgrounds for us has been great. There is room to set up hammocks and chairs.
The only unfortunate aspect about this campground is that it is somewhat close to the highway. After the first weekend we spent there, we got somewhat used to the sound - it can sometimes be soothing. It's also a good idea to bring something to provide added shade to either the tenting area or sitting area as it gets quite sunny in the morning.