Hi Suzie,
You may find some excersion information in the new 2002 Alaska tour guide:
<http://www.cruisemates.com/articles/cruiseguide/portsofcall/alaska/index.cfm>
There are so many good ones, I know it must be difficult to decide which ones are "too do", have fun :-)
Boy, I'll say there's a lot to see. My daughter and I are taking an Alaska cruise this summer, number 8 actually. We still haven't seen everything on the inside passage. We have at least two more trips, one on Princess so we can do a pre or post cruise trip into Wrangell-St. Elias National Park to stay in the new Princess Lodge on the Copper River (world's best salmon comes from there) and an expedition sailing up the inside passage. Never had a bad excursion in Alaska.
Friends that we travelled to Alaska with chose the Whale watching and wildlife. They loved it--saw all kinds of whales and other animals. End of June last year if time of year makes a difference.
J