My wife and I took a ten day cruise and land tour to Alaska when I retired in 2006. We saw the glaciers you mentioned as well as taking in the sights of Anchorage and then a bus trip to Talkeetna and then on to Denali. From Denali we took a dining car train to Fairbanks and spent a couple of days there before flying back home. We've also been to Hawaii, Paris, London, Amsterdam, Las Vegas, Orlando, Washington D.C. and Myrtle Beach...some mutliple times, but as for as the sights to see, nothing compares to Alaska!
I'm so glad you went and had a great time, zipline and all.