Where do old manky blankets go.......

[Spardo]

Think I'll try the dechetterie J, but they are a bit manky, as per OP, and some of the crisp light brownish bits stuck here and there may not be welcomed by someone for their treasured Chippendales.

I went to our local déchetterie yesterday with a full van (as usual as they charge by the "visit", not the quantity ). Over the years, I became friendly with them. So, I explained your situation : here, they would say to put them in the skip for "déchets ultimes" (it's the place for everything which has no chance of being recycled or not worth recycling because it would cost too much). But they suggested that you ring your own déchetterie as they could have a different policy where you live. (This is France...). As they say: "we much prefer people to ask rather than messing a skip by putting in it something wrong and advicing is part of our job !"
Good luck with your " couvertures déchirées et incrustées d'excréments canins desséchés"

They charge you?? As a private person? It is a long time since I went to ours but they certainly have never charged me. I will call in during the week and ask though. Left outside in the storm last night they might be a bit 'cleaner' by now.

[Biloute]

They charge you?? As a private person? It is a long time since I went to ours but they certainly have never charged me. I will call in during the week and ask though. Left outside in the storm last night they might be a bit 'cleaner' by now.

Yes, they do for a couple of years now.
We pay yearly the "taxe d'enlèvement des ordures ménagères" which includes free unlimited collection of yellow bins (recyclable cans, boxes, etc...), a limited number of collections of the black bins (domestic waiste) and a limited number of visits to the déchetterie. The bins have a chip which is read during the collection and we have a pass for the déchetterie. If we put more black bins or if we go more often to the déchetterie, we are charged by the extra collection or the extra visit.
Get prepared ! It will surely happen to you one day.
This is why I try not to go too often to the déchetterie. We have room for storing and when we have a significant quantity, I fill my van (a big Renault Master) in the right order to unload skip by skip quickly and not have to start sorting when in the déchetterie (It's quite small there and you can't reverse if you have forgotten something to put in the first skip in line).
Saying that, I don't complain about the charge: since we pay (not a lot, to be honest), they have improved much the déchetterie with multiple skips with clear signs, kind and efficient technicians who keep the place permanently clean and tidy. And also, since we might have to pay, people think twice before going: we no more see the place crowded, like it was before, with people going there only for socializing.

[Blaze]

We have always found the déchetteries in France extremely well organised, both where we lived before and where we live now, and run by charming, helpful people.
Businesses are charged for deposing waste so I imagine anyone coming frequently with large loads might be considered as a business, which is not unreasonable.
Our déchetterie also supplies terreau, terre végétale and chippings which are excellent and far cheaper than buying from a garden centre. The terreau is well rotted (minimum a year) and the soil is a real boon for our sandy soil.