I can see this from both sides of the argument, minimalism, versus convenience. On my first
Camino Frances (2013), I took a Canon pocket digital camera with 4x telephoto lens and a 6Gb SD card. It weighed about 4 ounces. I also had one spare battery pack and the compact charger. By the time I got to O'Cebriero the SD card was full of video and still images - over 4,000 of them. And I WAS culling bad shots each night. The solution was simple, buy another micro SD card at the next opportunity. Problem solved...
In 2014, I re-walked the
Camino Frances, this time taking only my 64Gb iPod Touch. Because I rely on this tiny "techno Swiss Army knife" for everything beyond voice and text there was perhaps 10Gb of "free space" remaining. This time, I made it as far as Ponferrada before running low on memory. As you know, there is NO WAY to add memory via SD card to an iOS device. So, I had to prioritize and cull shots I otherwise might have wanted.
Fancy solutions like uploading to the cloud cannot be relied on as you have no iron-clad guarantee of a good Wi-Fi signal every evening. Someday, you gat nothing, zilch. Other days, the signal strength is minimal and there is alway some fellow pilgrim trying to stream a video or something similarly spurious...
The moral of this story is that, if you have a modern digital camera you can always buy more SD cards. Note - Sony users - I said SD cards. These are standard for all cameras EXCEPT Sony products. Generic is good.
If you anticipate taking a lot of pictures and video I recommend seriously considering taking a pocket digital camera, with one spare battery pack and charger. Start with the largest SD card you can afford and know what the camera's maximum addressable memory size is, in case you wanted to d to buy another SD card along the way.
I carried my Canon digi-cam on a lanyard around my neck. It rode inside my zipped up fleece most days and was right there when I wanted to capture an image or shoot video. I did not carry a designated camera bag, and advise everyone to avoid doing so as especially in the cities, there are some folks who use a logo on a camera bag to target you for a grab and run. It is VERY rare, but it does happen.
Just FYI, when I leave to do the Camino Portuguese in three weeks, I am taking the Canon camera again. I will wear around my neck, again. However, this time, it has an 16Gb SD card. And I will have another as a spare.
I hope this helps....