I have to agree with Lafmom, many HS baseball players are potential prospects!
My son went to one camp,same reason as Prepster's. It is one of the most famous camps in the country. It was a skills camp, most of the campers were younger players, we sent son because it was #1 on his list. He also went because he was being recruited (he was a junior). For us, it was a worthwhile experience (and worth every penny) because he didn't care much for the facilities or staff. #1 school began to slip down the list. It helped alot in his decision. In fact, after the camp, he decided the following year not to take an officiial visit.
So we fall into #1 on gratefuls above list.
Of course most (if not all) college camps are mainly to make money! They use the camp to show off their current players, their facilities and staff and the really good ones take time to work with each player. In the meantime, they are earning money to help fund their program, pay for assistant coaches expenses (they don't get paid) and whatever else they need it for. If the coach owns the camp, it is his $$$$$. Many good camp programs also use it as a recruiting tool.
Some camps are designed for the "older" player, thus prospect camps. I am not sure if I would send mine to a "prospect camp" unless I knew who was running it or asked someone who has attended.
In response to the question asked in the initial post, senior prospects have from November to April and summer to sign. When do you think they should hold the camp?
College camps are not run in the spring, coaches have other things on their minds.