You know, brother, I'll tell you what, rags will always be of value. War or no war, people are still buying that stuff. Ultra had a bunch of brand outlets, the ones folks used to hype on, I could use the things from there now. Do a quick swipe, look if there is anything left if they're not trashed yet. Just don't go about rummaging through some trash, brand stuff only.
Walk into each of the stores listed in the quest objectives to complete the quest. This can be done over multiple raids if you're not able to do them at once. All of the required stores are on the first floor.
You can survive and leave the area in any raid after entering all the stores.