If the photos are important to you, take your laptop to a good computer shop. Even Best Buy can recovery files. It is not real cheap, but it might save your vacation images.
We had to recover some images from a hard drive that were deleted by mistake. It cost about $100.00.
I would be surprised if Princess does nothing. If they caught a crew member with the laptop, I would think they would offer some form of compensation, even tho they are not required to do so.
BTW welcome to cruise chat.