Easy there Coach. HS team should always come first in the Spring. NEVER, EVER, in the summer. That's the kid's time, and the family time.
I'm not a coach. I'm a dad. In our area, the HS always comes first. Those are the kids you go to school with. The clubs down here always try to schedule around the HS focused tournaments, but everyone understands that the HS comes first.
So it's OK in the summer , for 4 or 5 of your best players to not come to your club team showcase because their HS decided to do something last minut? Is that fair to the other 20 players on club team? I think it's unfair of HS coaches to expect that in the summer. The reality is , most of the HS coaches are competing for same dollar as the other clubs. It's a blatant conflict and no one will ever address it. You think its OK for a HS coach to dictate what club your kid plays for? I certainly don't.