I was 12 wks pregnant in our last trip and also hyper emesis. We booked the trip before I knew I was pregnant, and were celebrating my sons 3rd birthday. It was hard, not going to lie. I was crazy tired all the time. I puked A LOT in that trip, despite medication. Motion sickness made it worse. I frequently had to go back to the room and sleep in the afternoon while my family stayed in the park. It was still a fun trip, but I would never do it again in my first trimester. I think people who have uncomplicated pregnancies do OK, but when you're vomiting 6 times a day, its not much fun. I did need to go to first aid at MK one day and they were a big help. Don't be afraid to use those services if you need to. Drink lots of fluids, take frequent rests, and try to enjoy yourself. I also took Peggy pop lollipop drops with me. They didn't prevent me from throwing up, but were a great help curb the nausea after throwing up! Hope that helps! I feel your pain!!