there was (and hopefully still is) a pay phone at the mazama general store.
the early winters campground (my name may be off but the nearest campground to mazama) is nice too. I haven't stayed at any other though. A nice creek to chill beers.
If you are on the cheap, you can stay at the cutthroat trail head for free. there are a scattering of camp spots or stay in your vehicles. A outhouse is available and a creak is nearby. I have not had issues with bugs there but I could have been lucky.