Possibly. But camps are primarily a way to gererate funds for the program.
Depending on the school, & subsequently the number of participants, kids may or may not receive enough (even adequate) instruction. Some camps are "cattle calls!"(re: UT camps typically are several hundred kids!

) On the other hand, Stanford recruits mostly from their camps...so... it depends on which school, which camp, & what you are looking to achieve. If your son is really only interested in that school, then it may be good. As far as "is the school actually interested"...only the recruiting co-ordinator can answer that...but I'd say he's interested in funding the program, more than likely.
Not familiar with "showcase camps". Showcase would indicate others schools would be sending recruiters...You might want to get clarification on this... Ask specifically which schools have committed to attend, etc. Then, if your kid is interested in that school, he could contact them directly to advise them of his attendance at that camp, his contact info, & begin a dialog with that specific school...Coaches do like it when kids show an active interest in their program.
My son attende Only 1 winter pitcher camp as a freshman (14). A&M...He loved it, mostly due to first "exposure to college field & players taking BP. He visited a little with a player, who was a friend & got "some basic instruct"...
Hope this helps...