When walking the Frances and the Ingles this year, I saw many places to wild camp.
But, I do not put up a tent. NO fires. NO cooking. NO smoking.
I either use a bivysac or a hammock. Sometimes I use the Albergues,... for showers. Yep I pay for using the shower there. And sometimes leaving my bag there while I see the town. Eat. Get water etc. Other times I wing it on the way into a town. Then use A'berg for shower, etc.
Never camped, that is stealth camped, on private property. Never climb fence or enter pastures etc.
Set up right at sunset. Pack up right at sunrise. Never had a problem. Very discreet. I never tell anyone where I am sleeping. Best to be safe.
There are many web sites on stealth camping. What to do..how to do it... especially what NOT to do.
Sorry, but I am not into the snoring, rattling bags and talking at 4 am (the early to bed, early to rise group -- if you have walked a Camino you know them). Bed bugs and more. I prefer my own bivy or hammock.
At times, I feel safer among the four legged ones than the two legged ones.
Best to read the tips on web pages about stealth camping. Give it a try one or two nights. Takes a few times to get used to.