BJ,
This seems like a bit of an upward battle but your teens are worth it!

You said, “historically very disconnected from the youth ministry and the church as a whole”
I say, “Work hard to give them something worth coming to.” Look back at the list in the above post. You could start with #5, people love to be loved. Win them over.

Do you do Sunday school or have a youth Sunday service? One idea to get parents in the door might be to host a family Sunday school once a quarter. We did that today and had 5x the attendance (we call it Parent Connect). Parents enjoy seeing what we are offering their students and they get to experience that moment with their teen(s) and other families. It is not a time to preach at parents (so students feel like you are on their side), it is not a time to preach at students to show parents you are on their side. Just teach a message that everyone in the room will benefit from. That experience bonds families together and earns our ministry points with parents.

Hope that helps.