In Skagway the famous White Pass Railway is a thought. They also do a bus tour that is parallel to the railroad tour. That one makes stops if you want to take photos. It's prretty spectacular. We did the helicopter to the glacier in Skagway since there were other things we wanted to do in Juneau. It was wondereful and you can do them both while in Skagway.
My all time favorite tour in Ketchikan is the flightseeing to Misty Fjords. Misty Fjords is a National Park. It's an already glaciated area. Totally wild with waterfalls crashing down from high cliffs into the fjords below. You land on a mountain lake and the only sign of civilization and humanity is the plane and its occupants. The silence is deafening. It's totally awesome.