So I haven't read this whole thread, so I am sorry if I repeat that which has already been said. My advice is simply that using a DLSR on the camino will be more of a hinderance. I am a photographer, qualified in Multimedia. I love my camera, and I would never usually use a compact camera. I am not boasting my skill, I am merely letting you know that Photography is very important to me, so my advice does not come lightly. However you really need to consider the size and weight of the camera, and the lens that you are bringing. Are you bringing a low weight 1100d, or a professional body? Are you bringing one lens, with a long zoom range? This will surely not provide you with the quality of various smaller lens, but of course then you have more bulk and weight. If you are going to compromise quality then bringing a compact should be more than enough, especially since most compacts come with a lot more control over settings than they use too.
As you said, how would your carry your gear? In your ruck, would mean you need to take the ruck off every time you want to shoot, and it also means that leaving your ruck sitting down outside a bar or café is risky business. Carrying an extra case for your gear can get in your way?
Bringing an DSLR doesn't just mean the camera; it means bringing lens, extra batteries, a battery charger, extra cards, Lens/sensor cleaning cloths/sprays/kits. Maybe even a tripod?
Of course it completely depends on your reason for the camino, but for me, as a photographer, I think a DSLR would have hampered my enjoyment. I walked the camino, and then returned to various locations a year later for photographic purposes. I know this sounds very negative, and in the end you must decide for yourself, it is merely my two cents worth. I hope whatever you do, that you have a fantastic journey.
EDIT: If you do bring it, check out
https://www.lenstag.com I am not affiliated to this website in anyway, but I think it is brilliant.
Chris