I have no idea what "usual" is for this situation. What they end up doing is going to be highly dependent on the specific situation of the storm, and that will evolve and change over time. About the only thing you can know with good certainty is that they will depart an arrive at Port Canaveral as scheduled, unless they can't possibly keep to the schedule due to weather there. Everything else, including what ports they go do, alternate ports, or skipping ports for extra sea days, is completely dependent on what the storm does. For better or for worse, since the ship is completely autonomous once it leaves port, they have a high amount of flexibility, and can make decisions at the last minute based on the latest conditions. I'll repeat what I said earlier: given that the Dream sailings are short, and that alternative ports are scarce, there aren't a lot of alternatives. They can skip one of the two ports (or both), and/or re-arrange the order. I would think it unlikely that much else beyond that would happen.
