Couple of things to keep in mind:
Bring a phone that way you may be able to contact gites, campgrounds, etc.
Bring the Miam Dodo guide or any guide because you may either chose to stay at gite or be forced to.
Some campgrounds are listed in the Miam guide but not many
I am under the impression that the gites and campgrounds listed in Miam Dodo are advertised, meaning
that they have to pay and not all campgrounds/gites are listed.
The Maim guide also lists the tourist office in them, which maybe you best info on where stay, camp and
eat, etc. They can call for you to make reservations.
As far as the first leg, It was a bit hard, but not too bad.
Its the third leg that I would be concerned about. Leaving Sauges, it is 20 miles to the next stage.
This is assuming that you are following the Miam guide, which obviously you are not, but the point is you
are going to have to camp along the way, if you do not want to go the full 20 miles.
A good blog to read is Davey Boyd's he free/wild camped mostly along the way:
FYI, I never camped, etc. But if you meet people along the way who are camping, obviously you can ask
them for advice.
Bottom line: get the guidebook, bring a phone, ask for assistance at the tourist offices and other
pilgrims/campers, etc., and you will be fine.
Good luck and Bon Chemin.
Mark