I don't always have the needed supplies on me to make a lean to and have many times found myself with no torch or way of making shelter for the the night. It only stands to reason to me that if this kid is going to the effort to make a canteen and everything else that he/she has on them they would be carrying around a tent to sleep with. It could be unlocked along the way as a backpack upgrade for a raw science cost. 

I like the idea, especially as this game is a lot darker than the first grounded so being out and about at night, definitely feels more treacherous.

In order to keep the lean to/bed relevant maybe the dent wouldn’t fully restore health the way that lean to /bed would.. or it could act like a consumable. Just something so it’s not replacing the function of those items.