Welcome to LCT. Thanks for posting.
There is a different opinion in Alaska from the lower 48 as to what is considered luxury. So if you see a 3 or 4 star property, know that rugged is still the norm there and not to have high expectations. There is a reason it's called The Last Frontier. Go and enjoy the beauty of the place and not the hotels. A RSSC ship will have the highest rated amenities, food and luxury.