And of course, there will be a fair number of people waiting quite a while to "rope drop" the rooms, when they do make the announcement, so figure that into your plans as well. Likewise, when they make the announcement over the intercom, there will be a flood of people from Cabanas and other places trying to get to the elevators/stairs/rooms.
Personally, I don't even try to get to rooms right away. Avoid the crowds that way. It is a good time to be on deck or eating lunch or something.