When I booked for June, I had booked Tracy Arm right away, and then when I wanted to add, had to reenter all. I made sure that I had everything I wanted to do at that time to make sure that I didn't lose my place in line ( so to speak) I figured it was easier to cancel later than to miss out on the ones I wanted. Note: I didn't wind up cancelling anything. I don't think that they have changed it yet, so I would book anything I wanted the first time, so that you don't lose your place. Someone else may know different info.
Sandra
Sandra