With most logistics in safaris taken care of by TOs, one assumes that they make the best recommendations when they suggest itineraries and lodging options. I found this map that shows the layout of the area and thought it may help some people make better decision regarding the choice of accommodation in the crater area in their itineraries -
This shows only some lodging options, but hopefully, the location of other camps and lodges can be extrapolated with a little more info.
(Discl.: I have no connection with any lodges or businesses in TZ, so if this map happens to show lodges of a certain company, I am not promoting them).