I am ready to plan for a one or two day side trip in late Dec. .. I would like to go to the Atlantic side since we did the gulf side last trip. We were thinking of the Space center but it was more expensive than I expected.. is it worth if for a casual interest in space stuff?? Is there anything that I should make sure and not miss?? Also, is it safe to just find a hotel or are reservations a neccessity? Thanks!