I do believe that going to camps as some kind of a tryout could work, but the facts just don't prove that out. In most cases those recruited have already been discovered before they attend a camp. Example... nearly 90% of all players on the rosters of the College World Series teams this year had attended showcases and tournaments run by a single (unnamed)organization. I'm sure that several of the other 10% were seen somewhere as well.
I think where people get confused is when they find out how many recruited players attended camps at that school. Truth is, those players were (in most cases) identified before hand. It stands to reason that colleges are going to try hard to get the kids they want to their camps. Wouldn't any of us if we were in their shoes?
All that said... If a player is extremely talented he could definitely cause some serious interest at a camp. In fact, we have college coaches who report those kids to us at times. One other thing... There is two major reasons why we sell so many scouting packs to college coaches at certain events. The obvious reason is so the recruiters have more information on the players including contact info. The not so obvious reason is that these lists become a great source of revenue and becopme mailing lists for college camps and other events. Just think... for around a $100 a college coach has admittance to every field for a week in Georgia where he can see hundreds of potential recruits and he has a contact (mailing/email/phone) list of thousands of very talented players. That is called saving a ton of recruiting budget money while at the same time picking up a great source of producing a lot of revenue through their camps and other activities.
Camps are great... Don't expect any miracles... Get everything you can out of them.