Weather can change rapidly. Wear layers, you can always peel off a layer if you get too warm. A small backpack can come in handy to put jackets in or carry souvenier shopping purchases. Take at least a sweater or sweatshirt, along with the lined jacket. If you can try to waterproof your jacket if it is not allready made that way. You can get camp dry to do this at Kmart. Take a knit hat and gloves, you will need them at the glacier(s) for sure. It gets darn cold even in June. We went to Hubbard Glacier this last June and needed all the layers etc.
Independance of the Seas
Monarch of the Seas, October, 2007
Serenade of the Seas June, 2006