How old a boy? And how yeshivish do you want?
There are places for all levels and ages. Most camps have a website (or at least, clips to be seen on YouTube) so a look at the crowd will give you a better idea of what’s a good match.
I’d name a few, but the CR’s done enough fighting over the “how yeshivish” yardstick, so I’d prefer not to go down that road again