>>159740Yep it is, I didn't camp (stayed at Mammoth Lodge) but I don't know all the specifics about how and where. I remember reading that if you go into the Yellowstone backcountry there are very specific rules about camping, and they pretty much tell you that you're likely to die for one reason or another if you do.
You'll have to find the different camping options on their website (which, sadly, I've noticed is kind of a mess and difficult to navigate).
Hopefully another anon sees the thread who knows more about camping there