There are a lot of the Xunta albergues on the CF and some are only a short distance apart so that you could break into shorter stages. I walked over the New Years, 3 Kings holidays and all of them were open on the CF. For example between Sarria and Portomarin, there are small Xunta Albergues at Barbadelo and also another at Ferreriros. Between Portomarin and Palas del Rei there are several small Xunta Albergues, (At least 3 or four that I can think of) and so on. At the smaller ones we were the only ones staying. At the ones on the main stops there were usually enough pilgrims to open a second dorm, but they were not crowded by any means.
We picked up a small lightweight sauce pan at the Asian Store to use for hot water, soups, hard boiled eggs since there is no cookware, plates, cups, etc. in the Xunta albergues. At only one albergue (Arca in O'Pedrouso) the pan did not work because the stove was an induction cooktop and the pan was made of aluminum so you might want to upgrade from a sauce pan that cost less than 5 euros. (we just hung it from our pack with a carabiner.) At the smaller more rural albergues between the larger stage towns, there was usually someplace to eat at least one hot meal a day, however, not much choice for breakfast so I would bring snacks and easily prepared items for those in-between places.
At 10 Euros per night, the Xunta albergues are really quite a steal and they generally have everything you need (except cookware.) They were heated in winter and there was hot water for showers. A plug or USB jack and light is located on every bed, too.
Best wishes and Buen Camino!
Edit: Here is the home page so you can read about the ones on this way. There is a photo of the one in Tricastella on this page, too.
https://www.caminodesantiago.gal/en...-present/1.4.2.-the-network-of-public-hostels