I am booked on Harmony of the Seas for May 15th 2022. I have called royal carribean several times and sometimes they tell me I am required to book an excursion with them or I cannot leave the port then I call again and they tell me that I can book with 3rd party and their are no restrictions. I keep getting the run around. Can someone help answer this question. I want to go on the excursion that is booked with the outside tour company Thenford Grey's tours.