Collegiate ball is important and a great experience. But do not get caught up in the name. You want to go to a team where you can play. If you do not get a lot of playing time as a Freshman the last thing you want to do, is go to a big name team and sit. Many of the better known teams and leagues already have their rosters lined up. College coaches hopefully work hard in the Fall to get players positions.
But it is a hard sell to send a player out to a team that did not get any varsity playing time. I know at my sons old school very few players played in the well known leagues as a freshman. Most ended up in local leagues where they received playing time. The summer after my sons freshman year he actually played another year with his travel ball team. He faced tougher batters than the local college summer league.
If your coach has not helped find a team for your sons its time to get on the horn. I know that we have a league here in Central Ohio
http://www.leaguelineup.com/welcome.asp?url=tscl
Many area's have local leagues like this. They are usually full of D3 players, Starters and backups and D1 back ups.
There is a great thread about this subject, started by our own HokieOne. It has a lot of great insight.