The introduction to the funeral vigil wraps up with five sections on “Ministry and Participation.” OCF 64-65 covers that most controversial and elusive of post-conciliar values:
64. Members of the local parish community should be encouraged to participate in the vigil as a sign of concern and support for the mourners. In many circumstances the vigil will be the first opportunity for friends, neighbors, and members of the local parish community to show their concern for the family of the deceased by gathering for prayer. The vigil may also serve as an opportunity for participation in the funeral by those who, because of work or other reasons, cannot be present for the funeral liturgy or the rite of committal.
65. The full participation by all present is to be encouraged. This is best achieved through careful planning of the celebration. Whenever possible , the family of the deceased should take part in the selection of texts and music and in the designation of liturgical ministers.
What does this tell us? Participation is a sign: respect, concern, support. It is enhanced and facilitated by “careful planning,” including family involvement.
Catholic Sensibility 
It is a common practice in my parish for the minster of Holy Communion who has been attending to the deceased to attend both vigil and Mass. Even better when the family of the deceased publicly recognizes the minister at the vigil.