In Hushed River Valley, I found a third location for a polaroid. It was in a container next to an abandoned campfire. It was east of a rabbit grove and a cave, and directly north of Hushed River (the landmark location). It was west of a smallish pond. It is also south of a huge rock with an ice cave entrance on the direct other side. Sorry if my explanation isn't good. I used the wiki's map of the region to help me get a better exact idea of the location. It is a very random place, but I was glad to finally find it!