The most comfortable air mattress will allow you to tweak the amount of air inside the mattress. This will allow you to control how firm the sleeping surface is. If you prefer a softer mattress, release some air, or if you like to sleep on a firm mattress, fill it completely.
The type of camping you will be doing will largely influence how comfortable of an air mattress you can purchase. If you are bringing a generator along, you are able to dramatically increase your comfort levels. The most comfortable air mattresses for camping feature an internal pump which will require a generator to function. This does not mean that you can only be comfortable if you have a generator. There are other comfortable camping beds which can be inflated using either a battery pump or manually using a hand or foot pump.
However, I had to go through a couple of different models before I settled on what I consider to be the most comfortable air mattress (it was the if you’re wondering), but there are a few others out there that have been praised as being extremely comfortable also.