Have all the parents fill out a duplicate of this form:
https://forms.gle/xpV4YZePPkKcBPt4A
Export the results to CSV file /tmp/camp-responses.csv.
Download the permission form from here:
and save it to /tmp/2017_parental_or_guardian_permission_medical_release.pdf.
Edit field-template.xml to include the details of your specific event.
Run:
python csv-to-fdf.py
mkdir /tmp/camp-permissions
bash fdf-to-pdf.sh