Just a friendly tip from a former "band Mom". Check their Spring schedule as well. Our son's school always took their band trip in the Spring, and there was no way he would have wanted to miss that! The trip timing varied, but it was sometimes during Spring break (though not always). Like so many extra curricular activities, marching band does tend to rule you life - especially in the Fall, but I know for our son it was so worth it. I don't regret for a second having to shuffle vacations around his band schedule (and his stage crew schedule, and his robotics schedule .......

)
Looking back, though, it was actually much easier to find times for vacation vs now. Just wait until they are in college, doing summer internships, etc. You get just a few weeks a year when they can actually travel with you. If you're lucky!