A.I.
We just went in November. Most of Fantasyland is boarded up. The rides are running but it isn't very magical looking. If you ride the train you can see all the construction going on. Dumbo was open but can I gaurantee in the spring that it will be.. No. We go every year and knew what to expect so it did not bother us too much. My 4 year old girl is more interested i. Meeting princesses than the rides. If this is a once in a lifetime or you plan to go infrequently I would suggest waiting until it is finished because you will feel bad about the way it looks. Your 3 year old probably won't notice or care. There are the other parks also bit MK is where we spend most of our time. If you go have a great time!