Peaceable Projects Inc. is a U.S.-based non-profit group that brings the vast resources of the wide world together with the ongoing needs of the people who live, work, and travel on the Camino de Santiago pilgrim trail network in Spain.
I stayed in the same room several times with a man who had a portable CPAP machine and did not notice it at all. He told me that he had it and that the noise level was low and made sure that I knew about it. That was thoughtful. In, summary, not an issue for me at all.