Float planes to Misty Fjords from Ketchikan is supposed to be awsome....and expensive. Unfortunately we didn't get to see this on our visits.
You can walk through the whole town very easily and go to the lumberjack show, Creek street, up the funicular and down the married mans trail, and shopping.. The visitor center right at the dock has many tours if you decide not to book ahead of time through the ship or from the net.
The Duck tour was corny but a lot of fun.
No Glaciers really until you get to Juneau and head over to Mendenhall.
And if you can, book a ship that goes to Glacier bay....it's stunning!