We are doing this in December. We have to check into the park for seating on our day. At that time you will be assigned your place for the meal. For one, there are cancellations and unexpected situations, etc. ; so, they really can't have assigned seating til the day. This is touchy because of course everyone wants the best view, etc.; so, if there are no shows they want to coordinate everyone for the best viewing possible. Also, I heard the front, middle tables can be splashed. I'm sorry but I don't want to get wet, nor do I want my food or drink contaminated. Also, I heard table 13 is supposedly a good one. Now, my info is a couple months old; so, I may be wrong, here. Things changed very fast in Orlando theme parks.
I'll let you know once we have the experience.