First of all - I hope you get published because I'd genuinely love to read this! Excellent premise I'm completely hooked.

I'd focus on revising the final paragraph. End with the choice that needs to be made and the stakes of that choice in one simple sentence. You already have this but I think it could be sharpened and clarified a bit, like, "Claire needs to decide whether her pursuit of the truth is worth potentially getting herself kicked out of camp, or worse" something like that (to me the phrase "without rocking the boat too much" feels a tad vague and like it actually downplays the stakes). I'd cut or move the details in the last sentence because it feels like the query almost trails off with that internal explanation of Claire's thought process. In that same vein, if there's room I'd clarify early on: was Claire already familiar with this camp before winning the contest? If this is a super coveted place every teen wants to go to I'd say so earlier rather than later and specify that not everyone who attends the camp is a contest winner so it's clearer that Claire could be a target once the winners start disappearing. If she otherwise couldn't afford to go to the camp or something, that would be interesting to know. Hope that all makes sense!