Good luck with your hike, I might see you around, as the Pyrenees are my backyard and I hike there every year.
I use a MLD SoloMid when I'm on my own, or a Shangri-La 3 if the weather calls for it or I am with someone, and camp above tree line. Both shed wind and storms well, and the SL3 is really big and comfy for one on a long hike, think mega vestibule!. I use my trekking poles for support, so if you don't use poles, you will have to carry centre poles for either shelter.
Refugios are great fun every now and then, I use earplugs to sleep, french ones called Quies made of wax, one set lasts a few weeks and they weigh nothing, you can buy them in most french drug stores.
This year winter has stubbornly hung around, and there is plenty of snow still, and the long range forecast is for an unsettled summer.
HRP sections I have done involve much less up and down, but GR sections are fun too, mix and match depending on what you want to do.
I carry only half a litre of water as the higher up you go the water is better, and plentiful, and will be after this wet winter. I go cookless, and eat a hot meal in refugios every now and then, YMMV, but it keeps the weight down and the 'process' of being outside less complicated, which I value. I would think about walking east to west as you would normally be walking into and through bad weather, rather than having it follow you.
It is a fabulous part of the world, enjoy!