Being a physician, I diligently follow the Covid news. Unfortunately, there are already reports of small numbers of people who have been fully vaccinated who have acquired the disease. The vaccines are not 100% effective. In those affected, the disease appears to be mild, and perhaps more...
It sounds as if your Meniere's Disease (endolymphatic hydrops) is severe. It is potentially quite dangerous primarily because of the tendency to self-injury. I would think seriously about venturing out on the Camino where there might be stretches of walking alone and having no aid available...
There is a map somewhere on the forum that shows the location of all forum members. I can't seem to find it now. Maybe someone will post a link to it and you can find others in or near Hamburg.
The topic of the "value" of the journey versus the "value" of the Compostela has been discussed many, many times on this forum. I believe the general consensus is that the journey is the reward. The Compostela for many, including myself, is a souvenir. I had two of them sitting in their tubes...
I travel domestically and internationally with my power packs in my carry-on luggage and have never had a problem. Lithium batteries are generally not allowed in the checked baggage.
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