If you choose wisely, the camp/showcase can benefit you in a number of ways. Son has attended two "prospect camps" in the past 9 months at one D1 school he is very interested in. He did the first one as a sophomore and got a lot of very helpful instruction, including a lengthy video analysis of his swing. He also received a sheet at the end rating him on various skills. It was helpful to know where he stacked up in their minds so he could know what areas to work on. He attended the second showcase last month as a rising junior and this event was in our opinion over-crowded. However, he has already received two contacts (one from a JUCO and one from a top level D1 school) from coaches who were helping at the showcase, and these contacts seemed to be much more specific than the generic sort.