As I slowly expand my terrain collection, more scatter is always useful. These modern / post-apoc pieces speak to general decay.
Who wouldn’t want to sleep on these lovely mattresses?
The tent belong might be a camper, a lonely survivor, or a down-on-their-luck urban outdoorsman.
At cons I always see Flames of War tables with lots of little bits of flock or pebbles, sometimes literally swept up after the game. These plastic bags fit into the same idea.