He was sent to camp for getting high grades in school and considers that if this was his parents' idea of a reward, than he would've probably gotten into a lot more serious trouble if he had failed.

Despite Chip's constant vows to kill the two and fear of sounding like them, he is the only counselor who appears the most worried about them when they get lost.

As a result of Harold's verbal hostility he's a target for Rudy's retaliation (such as filling his shoes with garbage, then spilling it into his pillow when he's ordered to spill the waste out, or removing the wooden slats that support his mattress to build a box, and then capitalizing his resulting fall on top of Adam Willis below him as the catalyst for a major pillow fight (to be blamed on him for "Jumping on Adam for no reason at all").

He criticizes Chip's humorless handling of Rudy and Mike, initially believing that some activity (like arts and crafts) will keep the boys from running away.

It was founded thirty-one years ago by my grandfather, Elias Warden, and never once, before today, has [anything not normal happened]."

A middle-aged man with bow legs who apparently does not like kids, he strictly lives by the time in which his grandfather was director of the camp, meaning nothing to him can be different now from then.

[1] CM Magazine said that while it "[won't] ever be considered great literature", it is a "laugh out loud adventure" and a "Canadian classic"; however they also felt that the character of Mr Warden was "questionable".

[2] Pasha Malla, in a 2008 article for CBC.ca, wrote that "even beyond nostalgia, it's a fun, engaging read" and that the sarcasm of the main character had been "refreshing" for him.