Binoculars will help you see wildlife on land while sailing. A smaller pair will be easier to bring on excursions or keep on your person while exploring around the ship.
Pursuit 10x42 Binoculars
A packable waterproof back is a need. Save room in your suitcase by folding it up when not in use.
Eddie Bauer Stowaway Packable 20L Daypack
A waterproof jacket that allows room for layers is important as much of Alaska is covered with a temperate rainforest.
Weather Proof Oversized Rain Jacket in Dark Spruce
Warm, packable hat. The weather is milder during cruise season, but wind on the ship and in port will get you.
Carhartt Knit Cuffed Beanie | Bass Pro Shops
Moisture wicking wool socks that add padding for hikes.