My itinary in July of 2019 was:
Sarria, Case Peltre (not fully booked)
Portomarin, Albergue Folgueira (wanted to stay in Albergue Ferramenteiro, was full)
Ponte Campaña, Albergue Casa Domingo (not fully booked)
A Rua, Esperitu Xacobeo (was new and maybe 1/3 filled)
SdC, km0 (full, had reservation)
Avoid the "classic" endpoints of the stages in the guidebooks. Portomarin was unavoidable for me, the walk was more exhausting then foreseeable.
Last year on my CP I had to alter my plans, it was extremley overcrowded on the coastal. The time I planned, I was not aware that I walk 1 week prior the catholic youth assembly in Lisbon. Even SdC was extremely packed, had to switch to an Inn, all Albergues were full.