Just to clarify: In Summer the Cosmiques hut is now open so you will be starting from there instead of the Abri Simond (which is closed during the winter)
Also, it is possible to camp on the Valle Blanche in Summer (which is what I did)
Hey nice page. Quick nitpick - can you please re-title it as "Chèré Couloir" (two words)? I've never seen it as one single word like that, seems really strange...
In response to Om, the Abri Simond is open all winter, just not guradianed.