In the grand scheme of things, neither of those events will effect crowds much in January. We love January for the low crowds. We are going to be there from Jan 20-31, and I'm just going to avoid the MK on the Sunday and MLK day.
Lotusphere will impact hotel availability at Dolphin/Swan/Yacht/Beach and to a lessor extent BWV units -- but will have little impact on park crowds.Plus over MLK weekend you have the big Lotus conference over at the Swolphin.
We used to go alot during this time but haven't the last few years due to other problems but there used to be a dance group competion during that time at Wide World. Are they still doing it then?