In reply to Morgan Woods: I don't know about the Vallon du Diable, but I strongly suspect that it would be :
1) totally impossible to access without skiis/rackettes
2) very dangerous now due to fresh snow, it is avalanche prone at the best of times, being narrow and steep-sided
I have seen a slow avalanche drift menacingly toward my partner there when there was much less snow than now. I wouldn't touch it till later this season.