Further apology: I am neither Jewish nor Spanish, and as someone pointed out, I can't point you to anyone to interview. But I think you were also asking about where to look for more information. I think there is a rich history throughout Spain, and from my limited travels there, especially in Toledo. I think first person interviews of Jews who have walked the Camino, their reasons, and their impressions, would be interesting. I also think there are current events, such as the recent offer of right of return citizenship, and the pros and cons discussed by those eligible, as well as genetic studies of Sephardic Jews and Spaniards, that are equally interesting. since I am a big fan of history, religion, and architecture, the intertwined aspect of those in Toledo fascinates me. It may be difficult to find historical or current contributions to the Camino but surely they existed--if in no other way, the contributions made to literature, science, and philosophy at that time. And for those who believe in love, there is the (unproved) story of Alfonso VIII and Rachel of Toledo, though like all great love stories, it has a tragic end.