This:
TRS: Also, if your targets are high academic schools, then go beyond PG and PBR to look at Showball and Headfirst showcases. Probably not worth doing though any earlier than the rising junior summer, and as a pitcher, maybe even the rising senior summer.
There is some trickiness here. I don't think you want to put all your eggs in one showcase basket, or even one season of baskets. That's why I suggest going no later than fall jr. year to one of the Showball or HF events to get on coaches radars. Makes the connections that need to be made in the following summer easier to manage.
Also, if you are very enthusiastic about one or two or a few schools then don't ignore those schools camps. my "19 got all of his offers after being seen at a showcase and then attending a variety of schools' camps. Not everyone does it this way; heck, we didn't do it this way with our '17. But it is a method that can work, especially when your list of options is narrow.