|Subject: Re: Alaska on Ferries|
Alaska is huge, even the limited area you would like to visit. You might also like to see Skagway which is a gold rush town. I haven't done it by ferry but here is the website for the Alaska Marine Highway.
I'm not sure that Glacier Bay is accessible from a ferry route. There may be outfitters that provide excursions from Skagway. It is definitely worth doing. I think that you would feel rushed doing it in 10 days but it is better than nothing.
Barbara in CT