I have just returned from walking Leon-Santiago then Palas de Rei-Santiago in the Altra Lone Peak 4 with Injinji toe socks. I encountered all different sorts of weather - 4 days of driving rain and 2 days of snow. Walked some short 15km days, and some long 34, 42km days.
LOVE LOVE LOVE the LPs. Super comfortable, grip was exceptional. Lightweight. No blisters, nor even hints of blisters.
I wouldn't hesitate to wear them for 800kms. My LPs don't look or feel any different now than they did on day 1.
For reference, i wore Altra Timps on the Camino Portuguese last year - i found the grip on the LPs immeasurably better but the extra cushioning on the Timps was noticeable.
Another reason I love my Altras - on my first Camino in 2016 i wore Salomon Speedcross 4. Along the Camino, my knees got wrecked. Second Camino in 2017, in Salomons, same thing.
Third Camino in 2018 I switched to Altras, bc of the zero-drop and wide toe box. My knee felt SO much better! Fourth Camino in 2019 - no knee problems whatsoever!! I feel like the Altras are my holy grail. And with the grip of the LPs...
I hope you love your Altras just as much!