Hi Jill, what you're planning really sounds nice!
Your poncho looks a lot bigger than mine... Must be my eyes because our mats should to be pretty much the same.
No problem to sleep without walls as I'm concerned, or even without roof! I like it better this way, so it works for me. I usually sleep in the wild and don't look for a camping ground. Most of the time I even don't use my tarp... I pick a quiet place and sleep like a rock. 2000 stars accommodation for free! If it rains, I look for a solid "cover" (shelter, porch, bus-stop) or pay an accommodation (if not too expensive, easier to find on hiking routes)
I got this poncho-tarp from a friend, really basic and reinforced with duct tape on the loops. I use it with the strings and pegs from my D4 tarp. It worked fine, but I didn't dare to try it under any kind of rain... I know very well what would have happened!
Used alone as a tent, I think it's good enough for dew, but not very efficient against rain (and then, not comfortable).
If you really want to sleep outside under any kind of weather, why not a real tarp? It's a better coverage than a poncho and a lot lighter than a tent. And you can fold it and use it as a poncho: tested and approved!
What about a good bivvy-bag, a lighter raining gear and no tent/tarp/poncho-tarp gears for good days + accommodation for rainy days?
That being said, I hope the rest of your sleeping gear is good, because the weather will not be the warmest of the year!
Camping out is regulated in both France and Spain, with some distinction between wild camping and bivouac.
In Spain, regulation depends of the provinces. Generally, wild camping is forbidden and bivouac is quite unclear. It seems to be accepted, but up to policemen at the end. The Camino leads either tolerance (pilgrimage route) or severity (many disrespectful behaviors, especially on the Francés).
In France, both are legal: no trouble here... mostly! The law restricts camping and bivouac on private property (need to ask for authorization), protected and listed sites (no natural parks on your stretch, only monuments), ~200 yards around a drinkable source of water and
on the seaside. Note that there can be some local additional restrictions (up to people to get the information...). I'd say as long as you find a quiet place, keep low-profile and leave no trace, you should be fine!
Accommodation is more expensive in France than in Spain, but I think it's possible to find a bed under 40€. It
is a pilgrimage-sensitive route... Camping sites can be open all year long, or close after high-season (sometimes in September/October). You'll definitively find some open on your Way.
I don't know how is your French and if you already got those, but with a little pre-translation, it can always be handy:
- Pilgrim info
From Verdon to Sanguinet
- Pilgrim info
From Sanguinet to Tarnos
-
Not about the Camino, but can cross it and have useful info? and it's also in English!
(no date for the 2 first... updated?)
Nice (and wise) you have plans B and C! I'd locate the D4 and itinerary before, to avoid more stress in case of trouble. Depending on you travel-style, what about keeping the mat and have a dry/nice seat to sit/nap on along the Way?
Sorry it ends up to be a bit long...
I wish you the best on your Camino!