This is not a good land tour choice. You need to look at tours around 7 additional days. With your choice, a great deal of your time is in transit and if it includes the Natural History tour at Denali Park mile 16- don't even consider it- a complete waste of time. I can never justify all those hours to get there- 6 hours by bus from Anchorage for only a 3 hour tour. Superior is going on your own and taking the SHUTTLE into the park to at least Fish Creek, mile 53. At the very least with a cruise tour, you want the Tundra Wilderness tour. My opinion only, group point to point touring in Alaska misses all the great opportunities that may be of interest?
I can't speak to the land part of the cruise tour, but I've done two (third scheduled for Aug 2005) Princess Alaska cruises--both so far have been northbound Vancouver to Seward/Whittier. The Princess Alaska cruises were great.
I've also been on the Diamond Princess (sister ship to the Sapphire) and loved the ship.