We were on a cruise in Alaska in mid June and it was too cold for the outdoor pools. Friends of ours went in May and like to have burned up. You just never know. I believe there are some train trips out of Anchorage to Whittier that are day trips. You can also drive to Girdwood about 30 miles out of Anchorage. Lots to see and do in Anchorage itself.
Carnival Celebration 2003
Carnival Elation 2005
Carnival Conquest 2007
Royal Caribbean Rhapsody of the Seas 2009
Carnival Freedom 2010