Welcome to Flyertalk
There's been a running thread over in the Community forum about Anchorage and visiting it
http://www.flyertalk.com/forum/commu...up-thread.html
There's probably some great ideas in there (or at least some great people to contact for more information)
Matanuska Glacier for us was one of the most memorable things of our visit up there a couple years ago. Somebody owns part of the Glacier, and has opended it as a park where you can pay like $15 or something and go out and hike and climb the glacier. It's really cool.
We also had a wonderful time rafting with
http://www.novalaska.com/