Waiting until 8th grade and moving into high school seems late when thinking about taking the next step in lacrosse. If the training and technique of the elite programs provides a solid foundation, taking advantage of those programs at younger ages seems like the right approach.
Rather than just playing with the "A" or "B" team, you could showcase as an individual player, right - or is that just too hard?
Showcasing with a full team is much easier, particularly with some of the top clubs on Long Island. You develop a trusted relationship with the other players and coaches.
Signing up as an individual is like being a guest player in soccer without the paperwork with one major exception : lax showcase events charge extra fee$ to have individual players.