While you are in Homer, you can use the TourSaver for the Seldova Bay Ferry, which is well worth it with the discount. Of course, Homer is famous for its fishing, so you could also use it for one of the Homer fishing charters.
If you do get to Seward, definitely use it for the Sealife Center, which is also a marine wildlife rescue facility. Depending on your interests, the Alaska Aviation Heritage Museum near Anchorage International Airport is in the book and is an excellent airplane/bush pilot museum. For us, the Museum of the North at the University of Alaska Fairbanks was well worth the price of admission, with or without the TourSaver.
We have also taken the raft trip on the Nenana River at Denali, which is (very cold) fun too, especially with kids. Many years ago, I spent two weeks flying into Devil's Canyon on the Susitna River by helicopter (for a job, not for fun), which made for some exciting air time. Today many cruise ship passengers take the jet boat tour from Talkeetna into the canyon, although we haven't done it. Maybe the boat seems a little too tame compared to flying into that deep, narrow, winding canyon! And, while on the topic of river boats, the Riverboat Discovery tour in Fairbanks is in the TourSaver and is also very popular with RVers.
For those who have taken glacier boat tours from Valdez or Seward, the Portage Glacier boat tours are, in my opinion, a waste of money.
