Wow! What a trip. Hope you can go and experience exactly what we did.
Family of 6, grandma 78, dad 46, mom 45, teen boys 16, and teen girl 13. Everyone had the trip of a lifetime. Princess is the way to go! I think a lot depends on the weather and we were VERY blessed; not a drop of rain and sunny skies. I love to explore our options so I read every trip advisor/cruise critic I could find on every ship, port, and excursion and I am so glad I did because our trip was PERFECT (okay, I give God the credit for the weather :)
We had 3 cabins on the caribe deck with balconies on the right side of the ship. C515, C519, and C523. Get these cabins! We had our cabins overhang, but there was still one out farther than ours. It was perfect and make sure you get on the RIGHT side of the ship. Starboard? We saw about 50 dolphins swimming with the ship and as we were leaving Alaska, we saw lots of orcas.
Caribe deck cabins 515, 519, and 523. Get these. They're in the middle of the ship on the starboard side. Comfortable, quiet, and adjoining balconies.