If it's the first time you're all visiting or even if it's just your first time going with kids the best thing to do is change your expectations. Kids need to move at their own pace. I saw so many kids having meltdowns and every time it seemed to be over them being pushed too far. Don't expect everything to go to plan, or to ride every single ride, or stay from opening till close. While there might be some unexpected mishaps, remember that there will be a million more incredible memories.