Dr. Pepper, if that story was true – not nice. I tend to suspect ti was a joke.
I don’t think kids should be entrusted with tipping. They are notoriously careless, and may not even realize how important the tip is to the counselor. If the parents want to wait until the last day of camp to give out tips, they should give in sealed envelopes with their name and bunk on them, to the office with instructions for it to be handed to the counselor that last day after the kids board the buses. Each counselor could have a cubby for his envelopes and pick it up after camp.