If flights will be cancelled at Miami chances are far from remote that flights to Orlando will be cancelled as well. I think it doesn't really matter where you fly, it all depends on the further evolution of this monster, the forecasts have way too much uncertainty at this time. You probably will not have a good judgement before 1 day before landfall.

Maybe driving wouldn't be a great idea, concidering that the coastline may have faced an evacuation by then. Evacuating states are generally not know for their "easy driving" potential, especially not Florida

Btw, lekker hoor ff met een cruise, tis gewoon dikke pech dat dat ding er nu zit.