I am planning to come to Universal Dec. 3-7. That would give us 1 day each at Universal,IOA,Sea World and DC. is it enough time? I realize the parks close earlier in the winter. I am debating of whether to wait and come spring break-March 27-April1 but know the crowds will be heavy. We plan to stay on site(which will help with lines) not sure which hotel yet. any advice etc would be appreciated!!!