Eric: Thanks so much for your help. Emailed Jeneauinfo@allenmarine.com as you suggested and received the following:

"I’m sorry to be the one who has to give you bad news, but we will not be operating an excursion to Tracy Arm on that date. At that time of year the arm is so filled with ice that it becomes dangerous to operate marine vessels in the area. If you would like, you can try the other tour operator in town that does excursions to the arm, www.adventureboundalaska.com , but my guess is that, like us, they are not able to make it up the arm at that time of year."

Have emailed the operator as they suggested and am awaiting a reply. In view of the above, I doubt very much that I'll have any luck. As you said, at least now I know for certain!

Lee