In case some people wondered why he would go to a camp.
No need to shout at him like that.
No, he's saying it just so he can feel special. Lots of people go to camp over the summer. Lots of people also volunteer at summer camps, myself included. Nobody was going to ask him why he was going to a summer camp, and even if they did, he should have waited until prompted to tell them about camp. Instead, he pridefully declared to everybody that he was a volunteer, even though it's clearly nothing that out of the ordinary