Hi Van Beach. I have a friend who was on the very cruise you mentioned. He received an email that morning to let them know of the revised boarding time. So, I'd be sure to have access to the email address I gave them, if not the phone. Significant delays are posted on the Web site.
It would be great if we could register for updates like we do with the airlines. Whenever I check in for a flight, I scroll down to an area in which I sign up for flight alerts via text messaging. It can be kind of funny after I land...as I turn on the cell phone and have several messages, some of which inform of repeated gate changes while we were in the air!
Wishing you a FABULOUS cruise.