For whale-watching and those unpredictable splashes, I'd definitely recommend grabbing a waterproof case if your GoPro doesn't come with one. It's a lifesaver.
Also, for all the movement on hikes and bike rides, a gimbal stabilizer can be a game changer. It helps keep your video smooth and professional-looking, no matter how bumpy the trail gets.
Don't forget to pack extra batteries or a portable charger—cold climates like Alaska can really drain them fast. And for capturing the stunning expanses you'll see, a wide-angle lens attachment would really do justice to those landscapes.
And hey, if you ever want to do something more with your footage, like a cool video compilation, the folks in video production edmonton are great at transforming raw adventure clips into polished, share-worthy videos.