You might even venture so far as to inform him that he will playing with and competing against players who are most likely 1 or 2 years older than him. You might advise him to get into as good of shape as he possibly can before the camp starts.
All of this information helps James build some kind of expectation in his mind, which can only help him succeed during the training camp. Although my description of a junior hockey camp is minimal, we can extract one very important element of preparation from this scenario.
What has anxiety got to do with expectation?