Interesting idea - I haven't thought about summer camps for quite a while. There was a brief time in the 80ies when they actually had programming courses at holiday summer camps (not anymore, I think?).
I suppose you are talking about summer camps by universities about some technical subject? Sounds good, but wouldn't they mostly hire students?
No, I was thinking about real summer camps focusing on teaching programming (game programming, web programming...). I came across a few when I was looking for summer camps in the US. I can't remember their names. Try googling it.
And I don't think it only for students. I had the illusion (but I haven't really checked) that they want true professionals not students.