Anyone tried it, the practice of heating stones in the fire, digging a hole under where you sleep then bunging in the hot rock and cover it over.
I did it once whilst bivvying in late autumn, the next morning where I had been sleeping was bone dry and dusty as I had had a very comfortable night, the heat lasted through till early morning and even awake, the ground felt warmish.
But Know your rocks, rocks obtained from streams are not a good idea as the potential for them to break with impressive force when baked in a fire but rocks placed around the edge of the fire are usually a good candidate for heating rocks.
I did it once whilst bivvying in late autumn, the next morning where I had been sleeping was bone dry and dusty as I had had a very comfortable night, the heat lasted through till early morning and even awake, the ground felt warmish.
But Know your rocks, rocks obtained from streams are not a good idea as the potential for them to break with impressive force when baked in a fire but rocks placed around the edge of the fire are usually a good candidate for heating rocks.