If you are planning to stay overnight in Caldas de Reigna I do not recommend the municipal auberge there when the weather is colder or more damp. They simply do not turn on the heat even though they promise that it will come on at 10pm.
And there is some kind of "trick" to the water heater... If I recall correctly, whoever turned the hot water on first received the supply. So if a pilgrim used the kitchen sink first, the pilgrim in the shower would freeze.
Other than that, the entire walk and all accommodations were wonderful.
Even though I had 14 days of rain in a 17-day walk from Coimbra (late autumn)... I would do it again in a heartbeat.