>>525223While you can in theory find leaves, getting enough to make any kinda reasonable cushion for a bed will be difficult and moss is a growing plant, when you rip it up off the ground, you've killed it.
If you're a backpackerfag, you've already accepted the disadvantages of Therm-a-rest pads and if you're car camping, weight and size isn't an issue, so just get an air mattress or cot.
If none of the above works, buy a camper with a real bed.
