@jpes - I'm walking from O'Cebreiro to Fisterra & Muxia in 3 weeks time. If you are travelling through Dublin, just note that, as of now, the Aer Lingus flight arrives in Santiago @ 16.20h, which means you will need to stay in the city overnight to get the bus to Pedrafita do Cebreiro the following morning @ 08.00h. This bus actually goes via A Coruna and arrives in Pedrafita @ 11.20h.
Because of this, I'll walk only 12km the first day from O'Cebreiro to Fonfria and I've booked a twin room in Hostal-Pension A Reboleira. In fact, I've booked accommodation for the first 3 nights and will "wing it" from there on. Check out Pension Santa Rosa in Samos, Casa Barbadelo (just after Sarria) and Albergue-Pension Turistico in Salceda for places with individual accommodation offerings.
There are no shortage of accommodation types available to you within Galicia. As you're a planner, gronze.com has all the information you need to plan ahead (accommodation details, stage maps, etc.).
If it helps, my stages to Santiago are likely to be:
Day 1 - Overnight in Santiago
Day 2 - Bus to Pedrafita do Cebreiro, walk from O'Cebreiro to Fonfria.
Day 3 - Fonfria to Samos
Day 4 - Samos to O'Mosteiro (Barbadelo)
Day 5 - O'Mosteiro to Ventas de Naron
Day 6 - Ventas de Naron to Melide
Day 7 - Melide to Salceda
Day 8 - Salceda to Santiago
Let me know if you have any further questions.
Happy planning and Buen Camino!