Hi Jacqui
I began walking on 3rd April 2008, at Pau in France. I crossed the Pyrenees at Somport, not so far from where you will cross them, on 7th April, and the weather was glorious. Mornings at that time of year are nippy even on the flatter country. Also the wind can be a trial as it invariably comes from the west which is the way you are going, and I had spent several days ploughing in to severe headwinds. I struck rain on and off - no one can tell you if you will get a lot of rain or not.
On Anzac Day I picked wild rosemary to wear in my hat as I walked to Berliannos del Real Camino. I booked into the albergue there, and as with the albergue at Arres on the Aragones camino, the women helped to prepare the communal meal, and the men cleaned up afterwards. We had to introduce ourselves before we sat down at the table, state our nationality, and sing a song from our homeland. The facilities were not great, but I would not have missed the experience for anything. Perhaps you could practice up on Waltzing Matilda or Click go the Shears!
Buen camino.
Be brave. Life is joyous.