We've had a good experience with http://www.collegebaseballcamps.com/.
He went to one camp at UCSB which was a good experience even though he was really too young for it at the time. It was for ages 13-18, he was 13 and almost all the players were strong 16-18 yo. The coaches there worked with us to make sure he wasn't put in a situation where he was too overmatched.
My son, now 14, was signed up for a camp at San Diego State back in August which was cancelled, probably because Tony Gwynn was tied up with the LLWS, and they re-signed him up for a 4 day resident camp over the holidays that cost almost twice as much for no extra charge.
My son then had a back injury from starting up too quick with freshman baseball conditioning and can't participate in any baseball activities until after the holidays at the earliest.
The camps immediately gave him a credit for another camp.