I only know about one school and team (Blair girls). Yes, practices start immediately after tryouts and take place Mon-SAT (not Friday) until school starts. Practices can be either early morning or late afternoon, and on some days there are early evening preseason scrimmages instead of practices. And the schedule isn’t released until a week or so in advance. So in theory, your kid could miss three practices (and/or scrimmages) if they were gone Fri evening through midday on Monday, at least for this team. It’s a bummer for family events, but we consider summer vacation to be basically over for my soccer kid once tryouts begin.