[SenorZ]

I'm joining a new team as a mentor this year, and they anticipate a large number (up to 50) after our school club fair and demonstrations... 2nd year team.
In our meetings so far we've discussed a series of training sessions that students MUST attend to remain part of the team. I would highly recommend doing the same. If you have 10 weekly sessions and students only show up to 6, they probably aren't dedicated enough or educated enough for build season.

Too few students causes stress from too much work.
Too many students causes stress from distractions and possible accidents.