Yoldas Solgun I am not currently playing Vigor anymore mate, photos are usually just in random loot but are more common if the loot has been improved, and yes but I am not certain how many photos is in each game at one time but it is definitely more than one, you do not need a photo to find a loot stash though if you just randomly check any loot stash in the ground you come across and it happens to be a full one then you can loot it without the photo
As far as I’m aware you can still just go to the spot if you know it, only a couple per map/session are active tho so you’d be lucky to get the right one on chance