Include custom Product Fields in an email
The solution here (Drupal Commerce - Add Product Fields to Cart Form through Line Items) for adding Product Fields to the Cart View answered my question.

I edited the "Line Item" View to include my custom Product Field.  This is the View that drives the [commerce-order:commerce_line_items] token but per the answer linked above: 

For that you'll need to add I believe the "Commerce Line Item: Referenced Products" relationship in the view. 

You also need to give anonymous users the Permission "View own orders of any type" (I also gave them "View own Order Orders" but probably not needed) or the email says "No Line Items Found" for anonymous checkouts.