It depends on the type of player you have...
Nothing like a good performance at a PG showcase attended by college coaches during the recruiting periods, and other PG showcases like All-Star games where pro scouts are present are terrific for high performing recruits. Hit the right number on the gun, or wow them with your speed or power and you will get all the attention you deserve.
Some college camps are OK "if" they have already shown interest in you (seen you play, called and sent you mailers), but my opinion is that under the "new" recruiting environment, a kid who really wants that new 33% scholarship or more, is far better served with an excellent PG showcase performance, and then a followup with a college camp for a college you are seriously interested in (besides baseball) only after they have shown you significant interest.
P.S. If your kid is 6'5" throws serious gas, hits bombs to all fields or has supersonic speed then don't worry about college camps.