So if you have not reached out to your coach or made it clear in your exit interviews last spring, and let him know you are interested in playing Summer ball at that level next year. Do not wait! Make sure your coach knows of your interest. Some coaches place players as part of their regular process. Some coaches only place players that voice an interest. A coach does not want to place a player only to find out they are interning that summer or have a job to pay for college. Some coaches make no or little effort.
Coaches want you to be successful and get innings, so they should put you at a level where you will get reps. The elite leagues are not for everybody and the local or lower leagues can be a stepping stone to higher leagues in future summers.
Good luck. My son pitches in both the great lakes and the Valley League. It was a great experience at both places.