Hmmmm, interesting. Heartfelt compassion to you! I've had severe tinnitus for nearly 40 years. It was devastating in the first five years; the thought that the ringing would never stop, that there was no escape, was anguishing. In seeking home, I drifted towards the ocean, I'm sure for the comfort of the white noise (the cancellation of the ringing), and places where it is utterly silent like mountains (where the ringing is loudest) I would avoid.
But....I've come to just be at home with it. I stopped thinking of myself as a "tinnitus sufferer" a long time ago. There is silence within tinnitus. There is, oddly, comfort. It is uniquely yours, no one else can hear it: I pray you can come to a place of acceptance. It is, after all, the sound of your own blood stream flowing. Tinnitus doesn't have to interfere with your peace of mind, or your intellectual or spiritual progress. It may, in fact, as all adversity tends to, accelerate your progress.
I would say the Camino may be the best possible place to come to terms with this lifelong diagnosis. You will forget about it for hours on end with the challenges of the walk, the beauty of the surroundings, the unexpected connections. Awareness of the din may come crashing back as you lie in bed trying to sleep, but I think, honestly, we are all plagued and beset and haunted by one thing or another when the lights go out, from time to time.
Good luck to you, from one tinnitus pilgrim to another. Solve by walking, solve by loving. The Camino is so generous on both these fronts.