During summer breaks we would be together but my mother would chaperone.
Ask a "cool" aunt/uncle or trusted neighbors to chaperone a teen party.
The couple never went anywhere without a chaperone and rarely talked on the phone alone without other family members involved in the conversation.
The adults hosting the party can volunteer to chaperone the children as they travel around the neighborhood trick-or-treating and then drop them off at home.
I just got to see him doing the Drowsy Chaperone in New York.