The recruiter is probably the person primarily responsible for marketing the camp and running the logistics of it.
I would call/email the recruiter and ask him how many campers he maxes out at, that should give you a pretty good answer.
I am a natural pessimist when it comes to camps, but I believe they exist primarily as a money maker for coaches and secondarily as a chance for a prospect to be seen. That being said, a good number of people here will tell you that going to a specific camp helped their son get recruited there.