Can I suggest it would be a very good idea to phone ahead and book accommodation.
If you have an android tablet or phone this app will help a lot:
https://play.google.com/store/apps/details?id=de.moemke.android.mycamino
It is free to download and use - the writer asks for donations but that's it - I am not involved with the author but love it.
It allows you to download a map to your device so you can use it without available wifi but it also has maps that work with wifi.
Allows you to do a lot of very useful stuff - can set-up preselected itineraries and it suggests stops, can add rest days, maps of every town, city and village, shows the route, shows locations of all the hostels/alburgues and shows facilities, prices, and exact map location. If you zoom in on the downloadable map also shows banks, ATMs, restaurants, other hotels, police, post office, etc., etc.
I hope to start on the 4th Aug and I'm sure you'll catch up with me and shoot past
Buen Camino