You can find the last known location of your Airpods using Find My, however, it will not update until it connects to your device.
If you are unable to find your Airpod, Apple does sell replacements, where you can pay to replace one individual Airpod and you can look into it here AirPods Repair – Official Apple Support
In terms of doing anything, you should report it to the relevant authorities including the summer camp, you mention it is a secure location, so perhaps they have cameras to help identity who it was?
If you have had both your Airpods and/or case stolen, it might be more economical to buy a new set.
Also check out the help link below regarding your lost Airpods:
How to find your lost AirPods, AirPods Pro or AirPods Max – Apple Support