Answer: Guarantee staterooms may be assigned at any time prior to travel and up until embarkation day. Boarding Pass will show a stateroom number if it has been assigned but will otherwise show \"To be assigned\".
If you have printed your Boarding Pass prior to the stateroom assignment, you may wish to check back prior to departure to see if a stateroom has been assigned. Otherwise, there will be staff available at the pier to advise you of your stateroom number as you fill out your luggage tags.