My son attended an Apex event in the fall, very organized, good training and games. There was a lot of positive feedback from the parents on the sidelines. Obviously, as with every other showcase this past year, there were no D1 coaches in attendance, but their film was good quality, and I imagine that the D1 coaches will start to come out of the woodwork in June when they are permitted.
I would also add the Juniors Open and Main Stage as must attends. Last year the Juniors Open got prime real estate on the LSN network and still have an index to watch the games. These are new events but seem to have some press and muscle behind them.