40 litres is quite a bit of room... Early thoughts for when I do some serious distance touring (se asia next year) are 2 x 20l panniers, handlebar bag, room on the rack at the back and a small front rack as well. The more space you have the more you will carry. I reckon for your trip you should give camping a go. With 2 of you you can easily split the necessary gear and strap to the top of your racks in dry bags, leaving pannier space for the rest of your luggage.
Sounds like a great ride, I motorcycled in the area last year, well rode to Portugal and back.
Some absolutely fantastic roads I'd very much like to go back with a bicycle. Not sure what you're planning but if i remember right the n-634 is for the most part scenic and quiet because the main road that runs paralell has made it somewhat obsolete.*
And in answer to the actual question abut the terrain... it's not too hilly really. but then, that depends what you're used to.
*Just looked and don't think you'll be reaching the quiet and scenic part of the n-634 as that was further west. That west coast of france though is stunning as well... and flat... and camp sites everywhere.
40 litres is quite a bit of room... Early thoughts for when I do some serious distance touring (se asia next year) are 2 x 20l panniers, handlebar bag, room on the rack at the back and a small front rack as well. The more space you have the more you will carry. I reckon for your trip you should give camping a go. With 2 of you you can easily split the necessary gear and strap to the top of your racks in dry bags, leaving pannier space for the rest of your luggage.
Sounds like a great ride, I motorcycled in the area last year, well rode to Portugal and back.
Some absolutely fantastic roads I'd very much like to go back with a bicycle. Not sure what you're planning but if i remember right the n-634 is for the most part scenic and quiet because the main road that runs paralell has made it somewhat obsolete.*
And in answer to the actual question abut the terrain... it's not too hilly really. but then, that depends what you're used to.
*Just looked and don't think you'll be reaching the quiet and scenic part of the n-634 as that was further west. That west coast of france though is stunning as well... and flat... and camp sites everywhere.