Hello @
Granpeg , and welcome to the Forum
You can check this website for information's about the Abbergues between Porto and Santiago:
http://www.vialusitana.org/en/albergues_eng/
Regarding the other question, I know that there are some cities in Portugal that usually make great festivities during Easter. Braga it's one of them, and you can do a detour during your Caminho to see the city and what I'm talking about. I will search for more cities with any kind of special program.
Best Regards
Diogo