How you divide the holidays doesn't matter, as long as it's fair to both you and the kids. The key is not to have such a complicated plan that the kids get stressed about who needs to be where when. If at all possible, avoid splitting a big day in half, especially if travel is involved. Once you've got a plan in place, make sure your kids understand where they will be, when, day by day. This will reduce anxiety and make them feel confident they're taken care of.
Make it great: Talk things over with kids well before the holiday period. A color-coded calendar can help young children understand how the schedule works.