Hi, Rebekah,
Here are my stages from Mondonedo to Miraz:
Mondonedo to Gontan (I was in Gontan in 2006, an albergue was just about to open, so it should be open by now) (16 km)
Gontan to Villaba (20 km) -- my notes say it's flat and very pretty. The albergue is a huge modern structure about 1 km outside of the town. It was not well cared for when I was there.
Villaba to Baamonde (19 km) -- very nice albergue, and great meal with one of the camino characters at Restaurante Galicia.
Baamonde to Miraz (about 15 km)
So, it looks like you could start further back -- maybe at Navia? Incredible albergue, right on a cliff looking over the water. And there are some beautiful coastal sections just before and after Navia. I have a post with notes from my walk entitled "pictures from norte" that shows my stages.
There are two CSJ guides to the norte, part one goes from Irun to Villaviciosa, part two, from Villaviciosa to Santiago, at least that's how it was in 2006. I don't think you mean Lugo, because Lugo is on the Primitivo.
Laurie