We did plan to check out the glacier as one option, so that'll add an upvote. Fishing's a maybe -- we're our for a family wedding. Gonna be doing some biking and kayaking for sure. Would you suggest fresh or saltwater fishing? Fly fishing would be the biggest novelty for me -- I've usually just done bass, trout, and carp fishing with more conventional equipment.
Discussion
I enjoy saltwater fishing more. I have only fished Valdez in August, trolling for silver salmon. It was a blast, they put up a good fight.
Right now, you may be able to take a charter out and jig for halibut or lingcod. I would bet there are some roadside fly fishing opportunities along the drive for trout, dollies and grayling, but I don't know of any specific spots. Flesh flies or beads work in any stream with a salmon run.