I took my family on a Disney Alaskan cruise in August of 2016. Make sure you get a balcony it’s well worth it. I saw a huge bear with a fish in one hand eating away from my balcony. Plenty of opportunities to see dolphins whales seals and bald eagles from the balcony. In September it’s gonna be the very end of the cruise season. I remember it was never really warm on this cruise. We wore sweaters all the time but it was an awesome vacation that I want to do again. Disney is awesome and they know how to do cruising. They have a huge adults section and the kids absolutely love it. You are gonna have a great time. My cruise started in Vancouver which is a fun city. Try to stay at the hotel that connects to the cruise port it’s definitely worth the extra expense. This thread has Braught back great memories from that trip.