Oooh, I walked the Salvador once in the fall and it was lovely. A bit cold, I remember the Farmacia said 4 degrees when we left León.
If you are staying in Poladura de la Tercia, and if you want a meal, you should definitely call ahead. The Casa Rural, Posada El Embrujo, will serve meals to guests and pilgrims so long as you call ahead.
http://www.posadaelembrujo.es/. The place is under new management, and reports continue to be very positive. I have slept in the Embrujo and it was very comfy. The albergue might be cold in October.
The albergue in Pajares has heaters, and no need to call ahead.
Are you going to stay in Bendueños? If so, I would call ahead. That is a five star, fabulous albergue, and Sandra will cook for you as well.
I haven’t stayed in the albergue in Pola de Lenafor many years, but if I remember right, it is in a building that is closed on weekends, so you will need to get the key from the police.
What stages are you planning to walk? I have done a 4, 5, and 6 day version, so I have stopped at most of the possible stopping points!