11:30 a.m. is doable.
I suggest using Royal Caribbean's Luggage Valet program. It will cost you $25, plus the airline baggage fee, but you will not have to worry about collecting your luggage, lugging it to the airport and checking it in. You will receive your boarding pass on board. Then all you need to do is go to the airport, go through security and board the plane. Once you reach your destination your luggage will come off with the everyone else's.