If I am at a camp site with no internet access, but with a wifi router, a macbook, and an iPhone, I can sync songs on iTunes from the macbook to the iPhone seamlessly. No need for cables, no need to go through Apple's servers.
How can I do the same with photos, but in the other direction? You're traveling, for instance, and you'd like to backup the photos on your phone to your macbook, wirelessly (wifi/bluetooth), automatically (just as with iTunes), and without going through iCloud. What is the recipe?