As travel ball has become more relevant there are now two kinds of Legion ball. There's country club Legion ball ball and there's serious Legion ball.
If missing a practice is an issue I'm guessing this Legion team is the latter. What is serious Legion ball? It's high school level baseball. What would happen if a high school baseball player told his coach he was going to miss time for spring vacation with his parents? At our high school a player asked. The coach told him he could go. Just be sure to turn in your uniform before you leave town.