My daughter has a schedule. I am only allowed 2 weeks of uninterrupted parenting time per year, during the summer. The rest of the time she sees both of us. Her dad gets 2 weeks of uninterrupted parenting time per year as well. My husband's work needed him to go on a working vacation to Tuscany. I went, with the rest of my children, and gave up the time with my daughter so she could stay with her dad because he was uncomfortable with giving up his time with her. Sometimes it's really inconvenient to include kids of divorce on vacations, unless the schedule in place allows for it, or both parents are flexible.