We cannot really comment on the Nabatean Camp because we were directed to the Salman Camp. It was low season and the camps apparently consolidate.
We had a most enjoyable day and night at the Salman camp. During this vacation in Jordan, we stayed in many high-end hotels but the camp stay was our most memorable experience.
Mohammad the caretaker+cook, is warm, chatty and made us feel very welcome. He made a wonderful dinner and joined the guests around the fire and taught us a Bedouin song. Breakfast was also very good. The bed was comfortable and we had very heavy blankets which were great for the cold January night.
I would give the Salman Camp 5 stars but the water pressure in the toilets has to be better.