Great feedback from others and particularly good "across levels" perspective from Tequila. My only warning to his objectives would be regarding the "feel for level of play". Many one day single school camps get low quantity and/or low quality level players, therefore giving no indication whatsoever as to what one might expect for any level of play. Son once attended a camp for a strong D2 program. He stood out at the camp and, at the time, he was not one that would stand out at that level. This is an area where attending a bigger event and/or playing competitive travel with an organization that plays in the big events can be more helpful.
I will also reinforce some things with another perspective... If you were to look at college baseball job postings over the course of a year for the MANY volunteer assistant positions that come up at various colleges across levels, you will see a constant. Almost every single listing states that, while it is a volunteer position, money can be made via camps. So, virtually every college at every level puts on multiple camps sufficient to pay volunteer assistants. This knowledge should help you curb expectations. If you are crossing off a school because one of their camps wasn't run well, your actions may be misguided. If you are expecting all the coaches to be fully engaged and actively searching out prospects at every moment during the camp, your actions are most likely misguided. Without prior dialog, expectations should be low unless you are a true standout. Go for some of the other reasons Tequila states. There also may be measurables being recorded. But again, will they be done with the utmost attention to detail? Curb expectations. Will the HC, PC and AC be engaged? Sometimes. Keep in mind, this is probably their seventh day of work that week and only necessitated by the need to throw their volunteer assistants a bone, aside from maybe the one or two players they personally invited with the purpose of a visit, a third look, etc.
Lastly, not sure if already mentioned here but know the difference between a regular camp and a prospect camp and drill down further to determine if the prospect camp is a true prospect camp.