Karen, I don't recall any snowmobile excursions. The glaciers were all "inland" - the port cities are no right up close to where the glaciers were. So we flew to them. There was one excursion to the Taku Glacier Lodge. That was my favorite. We took a 45 minute plane ride over quite a few glaciers. We took off in the water and landed in water too. I have never seen scenery more breathtaking than I did on that plane ride. It was narrated (recorded) and you heard the narration via headphones. The weather at the lodge was maybe 60 degrees and right across the lake or river was the glacier. There was a live bear and we had a salmon barbeque.
Here is the info: (Bear included)
http://www.alaskaone.com/takulodge/