Hope it helps! You can pair the planning tool with "gronze.com" for more information. Gronze is in Spanish, but a chrome browser can translate to English... and you can get all the info you need on accommodations in each town along the Camino that you think you might stop in.
Also - keep your plans flexible and try to avoid totally booking far ahead (booking in the morning or night before is fine). Why? You may find you want to walk further each day, or you may want to walk shorter distances each day, or you may simply say "this is a nice place that I want to stay and explore". If you don't book ahead, especially not more than 24 hours in advance, then you have lots of flexibility. Very few places require booking further in advance (Orisson is the biggest, and the new albergue Borda near Orisson - they book out months in advance.)