The Eagle trips are out of Haines, and the Lynn Canal is sailed by your cruise ship, if you wish to be out on deck to enjoy it.
Eagles are viewable most everywhere in Alaska, you just have to look and invest the time looking. Out of Haines the numbers of eagles are not there until after the cruise season ends. But you will see plenty of eagles, do not expect any other wildlife. The float trips are very scenic.
Glacier Point is superior for scenery in my opinion.
This is not the place for significant wildlife. Any sightings is a gift.