Not a Disney excursion, but my family did this one last summer: https://beyondak.com/trips/glacier-canoe-paddle-trek/
It was incredible! The kayaking was tough, but worth it.
We hiked up to Laughton Glacier when we stopped in Skagway on our trip in July 2016. Not gonna lie, it was a hard climb up and even harder coming down as the little rocks are slippery so it is tough on the ankles. It was one of the most beautiful places I have ever been. It was so peaceful. We even got to see the the glacier calving while we were there. I would do it again in a heartbeat! I would definitely recommend it if you are able to climb and it is something that you are want to do.