I understand a bit more. Sounds more like "regulars". I did forget that the area is obviously "sub 3 million people GTA".
That said, if I could offer some legal help here, (off record), I would:
1) Make sure the waiver clearly states on the top "by signing this you are waiving certain legal rights" in 3x the font in YELLOW (see court ruling of zip line operator in BC ruling)
2) Have a section acknowledging the FPS limit of the field. A specific spot to initial this.
It will help and costs you nothing.
"....Your life is ending one minute at a time..."