Picking the wrong end of the problem
They are, as quite often with Journalists worried about the wrong thing.
State actors or sophisticated rivals getting copies of your pictures are not really the problem, no matter how sneaky you think you are, most likely if anybody who matters cares, somebody has a pretty good idea of where you are doing and what you are photographing. In addition, your photos are not much use for "journalism" if you can't publish them.
What is the problem & is becoming even more pressing is those actors who want to prevent you from keeping the photos or getting the photos out, even down to your local police forces who want to stop photos & specifically videos of their abuses getting out.
What they need is simple easy to use, reliable & fast remote storage capability with auto mesh replication and multiplexing mobile bandwidth to servers across several types of regimes.
So you start shooting with your camera and also taking video.
Photos / footage is usually stored on your device unless you decide not to.
Friends / activists / fellow journalists / hidden drops have small pocket sized receivers that get the data right away and store it, as well as mesh with each other to replicate the data as much & far as possible.
Automatically links to all available mobile communications devices and uploads as quickly as possible using multiple carriers / links / hops to fixed communication lines.
Automatically replicates the data to servers around the world with different regimes (preferably lots of ones that don't like each other), so the data can't be easily confiscated.
Other people make offline copies to store, just incase the NSA decides it's time to hack your servers & delete all the copies of said pictures.
Then you don't have to worry about carrying photos / videos through borders / checkpoints on your camera, you can for that matter have nothing with you at all except for the hardware with no data stored