Although PG's thread on "Changes in recruiting" in the Main forum may have some bearing on your decision, I'll share our experience.
Son is a Junior this year. Last summer, we very much wanted to go to Stanford's camp. But the camp was already full by the time we received the application. Initially, plan B was to go to KU's camp but since our son is interested in a Service Academy, opted for Army's camp instead.
Although it was a good experience, Army coaches told my son NOT to come back to Army's camp this year but instead, do everything possible to get to Stanford's camp. If Stanford is not a possiblity, then get to KU's camp in August. The reason for this is that they want to see him against high caliber competition.
Budgeting issues are a concern for us, because nothing is close. We made the decision last year to invest in one camp that was of interest to my son. This year, we will be much more aggressive in our choices. Our plan is Stanford camp, one PG event, and a fall team that will go to AZ classic and Jupiter.
The Jr-Sr summer is the time that you absolutely want to maximize your exposure. So I would suggest that you do the college camp this year at a school that perhaps has some interest to your son. Hopefully, a college camp will also have beneficial instruction, so he will be able to pick up a few things that he can focus and work on thoughout his Junior year to become a better player. Showcases are generally designed to "show what a player has", not to develop that player in his skills. Save the showcasing for next year when it will be most valuable to him.