First you have committed to your home club. The team you spend most of your time with. Second there are many opportunities to play on side clubs different from your home team and witch “may” provide a different opportunity. My feeling is if this side club interferes at all with your home club then the home club may have never been your choice or you have FOMO and feel that if you miss this opportunity you kid will never make it. Don’t let the side club, that may play a few tournaments interfere with the real meat and bones of team lacrosse. Many of the “allstar” teams are just money makers. Would you like it if you planned a birthday party with your friend and they cancelled because they decided to hang out with a friend of a friend that they kind of knew to get a beer.