I met some people but no one who was actually doing the GR10 trail. They were basically hiking only for few days. Some of them were saying how brave I must be to do this alone. We shall see, I wasn’t even sure I would be able to go further.
Once you pass Hourquette d’Ossou, you will soon arrive at refuge Bayssekance. There is a possibility of a bivouac, however, respect the rules. Some flat ground can be found close to the barrage d’Ossoue. You can camp next to the refuge Grande de Holle for 5€. If you want to take a shower, you need to pay another 3€. You can buy there something to eat or drink. It is 20 minutes from Gavarnie. More information: here.