I did it last late September; from Lourdes to Betharram (monastery albergue), Arudy (parish), Mauleón (municipal), Oloron (Amis du chemin, others), Hôpital Saint Blaise (parish), St Just Ibarre (private), SJPP (lot of choices). The albergues are fine. Calling for a reservation is customary. I saw many "rural hostals" in farms, but I don't know about them. Kitchens are not always available; sometimes dinner is offered (for a price). Arudy is "donativo". Walking in France is more expensive than in Spain.
It is a
very beautiful and picturesque way (see pics in
Godesalco guide). Mostly rural roads, gravel paths; some sections of paved roads with scarce traffic. Little villages (note: most of the times without commercial services), farms, woods; a couple of medium cities. Quite lonely, too (apart from Oloron, where you meet the people going to Somport). I walked between 8-10 hrs daily (I am rather slow...) alone, with almost no person in sight. It has some tough sections, especially the "col de Napal", before Ibarre. I think some trekking experience is advisable. I noticed other pilgrims were walking in pairs or groups, but maybe it was just a coincidence.
Signposting is very good, but some sections has many alternatives that require attention.
There are some online guides:
Gronze (in Spanish),
Peterrobins (English),
Voie du Piemont (French)
and some printed ones. An association in Toulouse,
ACIR, offers a free pdf available by request (they also have a fine printed guide).
Buen camino!