We're headed to those same ports in September!
We thought about doing the Zip Lines in Juneau, but decided to see Mendenhall Glacier and a hatchery instead.
We're for sure doing the White Pass Scenic Railway, but they also have an excursion that sounds amazing called "Adventure Park and Ziplines. That would be my second choice. (We are going through Princess for ours)
In Ketchikan I really wanted to go on a crab boat and feat, but my hubby doesn't like crab, so we're headed to Eagle Island via Kayak. That sounded like a lot of fun!
There are so many choices!! Just pick something that interests you and go for it! We do like to go through the cruise lines so we know the times, payment, etc will work for us.
Have a great time!