OK folks, based on all the great comments / advice we've finalized our planning. We've decided to jettison the TC and do something a bit different - joining another couple for a two week trip in SE Alaska.
Based on many recommendations, we are going fly to Ketchikan and take the ferry to Juneau as a walk on, likely getting a cabin. It's an over night trip morning departure & next day morning arrival. But we are leaving May 31 so full darkness during that time is only about 5 hours.
In Juneau we will take two side trips during our six days there, one to Tracy Arm (Sawyer Glacier day trip) the other to Gustavus (Glacier Bay 3 day trip).
To cap off the itinerary we are then flying to Elfin Cove (north end of Chichagof island west of Juneau) for a week of fishing for Chinook and Halibut and sight seeing in the northern end of the island.
http://www.watersedgealaska.com/Waters_Edge_Lodge/Home.html This lodge provides 22 ft fishing boats for our use, self guided, no captain.
Any comments on this itinerary are welcome. For sure, this trip will only scratch the surface of all the many fascinating places to explore in the SE AK area... but, it's a start.
Thanks for all your postings - much appreciated!!
Bob