Hey Tom,
Thanks for reaching out to us!
As far as I am aware, the Follow Up Emails plugin would be the best approach since it does integrate with WooCommerce. However, I don’t believe it has the ability to send emails relative to the event date but this could probably be added with a little bit of custom development.
Additionally, you could request that this feature be added to our plugin via our UserVoice page.
I’m sorry I wasn’t able to give you a direct answer to this question but hopefully this will help to get you pointed in the right direction. If you have any further questions, please don’t hesitate to ask.
Thanks!