Probably too late for the OP, but maybe of use to others going in the future.

You can walk a very short distance to the Great Alaskan Lumberjack Show http://www.lumberjackshows.com/alaska/index.html and buy your ticket there or online. The show takes about 90 minutes and is good entertainment.
In this same area is the SE Alaska Discovery Center.

It's also fun just to walk over to Creek Street and browse in the shops. For a spectacular view, take the tram up to the WestCoast Cape Fox Lodge and have lunch.

If you might be interested in a 4-hour or 6-hour charter fishing trip, Ketchikan Charter Boats, Inc. http://www.ketchikancharterboats.com does a good job and they will work with you if you are a cruise passenger (i.e. picking you up, having the fish processed and shipped home, etc.). BTW, they do give other discounts not listed on their web site if you will call them and just ask [e.g. military (active & retired), Alaska Airlines employees and perhaps others]

If you are really thrifty, you can take a city bus (red line route) to Saxman to see the Totem Pole Park. No charge to see the totem poles on your own. Take the Red Line Bus http://borough.ketchikan.ak.us/publi...forwebsite.pdf