I know nothing about the showcase/camp that you’re asking about - BUT, perhaps my experiences on a relative subject might be helpful.
Looking at prospective talent can be very, very expensive for a college and university. Granted the big names that are in the top 20, year after year, do attract attention when their name and marque is on a who’s-who in attendance.
I have found the following to be the predominate business of those institutions that I use to visit, from time to time. Those institutions were from Maine, south to Delaware, and westward up to Amsterdam, New York.
So for the colleges and universities attending:
(1) Expense budgets were metered closely. Money is always a tight and touchy subject, so results had better be served up and quickly, along explaining “was it worth going?”
(2) So to limit the exposure of sending money OUT, non-staff made up of alumni, booster clubs and others are usually waiting in the wings and provide good feedback from these and other events.
(3) Contacts, contacts, contacts are invaluable to a college recruiter. Like any well run business, dealing with a reliable source of resources is the thing. Relationships are built over time, within a workable distance - source, to and from providers, then back to the source again. These relationships conform to a travel distance that makes the sources of talent, usually, within reasonable travel distances. It’s not uncommon to have a radius of about 90 miles from the institution, to high schools and other sources from which to recruit from. On the other hand, over the years of coach-to-coach interaction, some sources of talent can be a mainstay for a college and university.
(4) On the fringes of all this, there’s are contacts that some recruiters use that blend in non-athletic relationships based on fraternal, religious, and close personal friendships.
Other things in the mix are worth considering.
(a) Why would a showcase in say, San Diego, or Miami, or a coach in attendance from the Arizona State Sun Devils baseball program, want to see a kid from Jersey City, New Jersey? I mean, all of these locations have a bumper crop of great baseball talent… so… why you? Granted, you could be very good at your level, but then again, there are just so many seats at the table. Going back to (1) through (4), a lot of those seats are already taken.
(b) Cost/benefit relationships are a basic business part of any business model. Thinking in these terms can save you a lot of cash right up front.
(3) Take a close look at the rosters of those colleges and universities within a 90 mile radius and see how their on board talent stacks up against your son. That kind of established product/talent is what these showcases want to present, nothing less.
I know I didn’t address your question head on, but I hope my comments and observations will help you in some way.