We were on the Summit to Alaska in Aug. '03. Our friends actually changed cabins before the cruise to get the "better" view. But we were the ones who saw the Orcas from our side.
We don't hang out in our cabin much and they had a balcony. We spent a lot of time in the public viewing areas and saw a lot. As for the last day going through the rest of the Inner Passage, all you'll see of the coastline is TREES! You willl not be that close to them and will have plenty of ocean on either side.