My son attended a camp at that age because we didn't realize they were about recruiting. We thought it was a way to spend a few days in the summer learning about baseball. Better than sitting around playing video games, and there wasn't much else for an 8th-9th-grader to do in the summer, since he was playing baseball most Th-F-Sa-Su and so couldn't do (or be a counselor at) other kinds of camps.
Did nothing for recruiting! Good thing we didn't expect anything. I will say that when he finally did go to one recruiting camp (17U summer), he learned some things that he continued to use.