If you are thinking about climbing the Dana Couloir don't wait for fall! I soloed the route yesterday and the ice is disappearing about 150 feet below the col. I was forced to climb rock on the right side before moving back to ice for the final 100 feet.
Other than that the route was great with mostly thick neve, and a narrow band of blue ice near the top. The worst part was the sun cupped snow field from the col.