Agree with much of this and with PTWood about using a college camp for showcase prep. My son went to a college camp after travel ball ended the summer before his junior year, about 3 weeks before his first showcase. It was a very valuable experience for him, from what to expect at a showcase, to over coming jitters about the unknown (no teammates & in a different state), to gaining confidence and knowledge about the recruiting process, etc. He is a position player. The experience may not translate for a pitcher. The camp was well organized, at a great facility.
I'm talking preparation for a showcase. Son benefited greatly in the recruiting process because of efforts made by his travel coach.