IF it happens at 11:30 it is unlikely you'd see it from the ship
as boarding to begin b4 11:30 is unlikely ... this is about the earliest it begins on a GOOD day. I seriously doubt you can be on the ship and settled to a watching place by 11:30
I don't know how you are getting to the port, but finding a good outside place to watch at about 11:15 would be my recommendation (Grills is OK, Canaveral Pier is better)
I watch launches from my pool . . . .
BUT ... few launches happen on the first scheduled date, and few of those at the original sched' time .... so there is HOPE!
IF it happens, a ship in the port is about as close as you can possibly be.