In the photograph to the left, you can see far below in the upper right hand corner, Ingraham Flats Camp. Notice that the camp is surrounded by large crevasses. Always remain roped when wandering around areas outside the camp. A hidden crevasse is always a possibility and you certainly do not want to fall into one of them.
Ingraham Flats, unlike Camp Muir, does not have any toilet facilities, so all solid waste must be packed out. But all in all, we found the Ingraham Flats area, like Camp Muir, to be in a very beautiful setting, and it was a great experience to watch the sun rise and set from such a spectacular location. I found great photo ops on Mt Rainier from start to finish.
So whether you use just Camp Muir, Ingraham Flats or both, you can't go wrong and they have aided countless climbers reach their goal on Mt Rainier over the years.