I walked this spring and was able to stay pretty much wherever I had set my sights on for that day, although occasionally only hotels were available. From Almeria to Granada the Amigos administer nine or ten albergues, codes for which are supplied from Nely each day. Generally excellent facilities at each. Contact her, she's the best. The guide is excellent and updated regularly and the amigos on other parts of the route really helpful, too.
From Cordoba there are a couple of long stretches, 32-35km without facilities, which for me, being more of a 20km/day kind of girl, necessitated a taxi for part of the route. Not something you'd do often, as they're expensive. Generally you'll need to carry water for the day, as most fuentes were dried up or non-potable, if available at all. I managed on 2L/day, except if the route was longer that day.
A highly recommended route, if solitary. PM me if you want a breakdown of recommended albergues/places to eat.