I think you can look at the photos without worrying about invasion of privacy.

A couple of years ago, I found a purse with keys, $200 cash, a wallet, gold earrings and checkbook (but no license). I had to go through the person's wallet to get the owner's name from their credit cards but the number was unlisted. There was a piece of paper hidden within it with a number scrawled on it and when I called it was the owner's friend. If I hadn't gone through the entire wallet and found the paper, I wouldn't have been able to return the wallet so quickly.

I would look through the photos and see if you recognize any landmarks in the background. If you see anything you think may be really private, you can always turn it off