I’ve uploaded a generic group flyer for anyone in your program to use. If your large group has small groups that get together then you can make this pdf available for them to download, print, and write on for their group.
There is a section for parents to sign and consent as well as blank areas for leaders to write the “what, when, where, who and how” of the get together.
If you oversee a large group you may at times be too busy to make them a flyer but at the same time you might not be happy with what they are sending to parents. In this way you are enabling them and at least meeting the need for aesthetic.