I think the responses so far are validating my hesitations...
So my next question would be, of the Radiance itineraries (northbound or southbound) which is "better" or different about each? I know they are the same ports but is there any advantage/disadvantage or difference between? And finally, is Icy Straight an actual port? Can you get off the ship there? and what about Tracy Arm Fjord?
Icy Strait Point is the small town of Hoonah, Alaska, and you do get off the ship there. I went whale watching in Hoonah with F.I.S.H.E.S.
Tracy Arm is a 30-mile-long fjord with twin glaciers at the end. A lot of cruise shops don't allow enough time to get through the ice, and don't always get to the glaciers. However, the fjord is pretty. Jewel goes there, whereas Radiance goes to the much more impressive Hubbard Glacier. Both are scenic sailing days.
Northbound vs. southbound is a matter of personal preference. On Princess and HAL, the itineraries are slightly different each direction. However, the ports are the same on Radiance of the Seas. Advantages of the northbound are that the scenery gets more and more spectacular, and you also get more hours of daylight when you sail north. A lot of people prefer the southbound if they do land trips, as they do the more hectic part of the trip first, and then relax on the ship.
I have been on 2 northbound one-way cruises and 2 roundtrips. If I do another Alaska cruise, it will be southbound after I spend some time in Alaska.