I stack two flock double airbeds, and then line the top flock airbed with a feather down duvet in a cotton cover, and then sleep on top of that, with another feather down duvet on top of us, when the missus and I camp. Plus we take our feather pillows. All makes it supremely comfortable.
Sleeping on top of a one flock airbed with a sleeping bag and camping pillow is absolutely miserable and uncomfortable.