Have sailed Mercury twice ih Alaska in June for the last two years and love"this ship". In 1999 we did June 15th and the weather was a little cool with quite a bit of snow at some port calls.( Mt Roberts in Juneau had lots of snow). We are sailing the Infinity to Alaska on June 9th this year, but I know I will miss Mercury.(i think this size ship is perfect.)...........Bigger is not always better.....Enjoy Alaska, its my favorite cruise.