There is a very nice walk thru wildlife park near Portage.
The glacier/wildlife cruise out of Whittier is great. Lots of sea life, birds and glaciers, plus a salmon hatchery.
There are several good cruises out of Seward.
The Sea Life Center is Seward is a working research facility with lots of exhibits, a two story viewing tank, and a touching pool.
A couple miles west of the Seward/Soldotna road junction is a gravel turnout, stop there and look up on the mountains, mountain sheep are often visible
The Cooper Landing area has full facilities and is famous for the salmon fishing in the Kenai River. Check the seasons.
Homer is famous for halibut fishing, there are reveal charters available. While there, see if you can get to Halibut Cove, a neat artist colony across the bay, built on a bunch of rock islands and connected by boardwalks.
The DW and I took a halibut charter from Seward. The packing plant will pick the fish up at the dock, cut it up, flash freeze it and ship it. We found the cost of the trip, licenses and processing the fish came out to only about 40 cents a pound more than buying it at a store at home. Plus we had the pleasure of the trip and fresh halibut cooked in our camper.
You will wish you had nine weeks instead of nine days. Enjoy the trip!