Hi Kate,
It sounds like you're looking to do a bulk import.
The first thing to know, is that a bulk import can only be used in a new survey: before the first images are uploaded.
Beyond that, you can follow the documentation here on how to create & import the CSV:
https://camelot-project.readthedocs.io/en/latest/bulkimport.html
Let me know if you get stuck in the process.
Regards,