Remember, you can check all of Paschale Solemnitatis on this site, among many on the internet. With these two sections, some notes on publicity and catechesis:
95. In announcements concerning the Easter Vigil care should be taken not to present it as the concluding period of Holy Saturday, but rather it should be stressed that the Easter Vigil is celebrated “during Easter night”, and that it is one single act of worship. Pastors should be advised that in giving catechesis to the people they should be taught to participate in the Vigil in its entirety. (Cf. Sacrosanctum Concilium 106)
A liturgy of two to three hours can be demanding for some. I have to confess I’ve encouraged people with young families to come for the Liturgy of Light, then return for Easter Mass in the morning.
96. For a better celebration of the Easter Vigil, it is necessary that pastors themselves have an ever deeper knowledge of both text and rites, so as to give a proper mystagogical catechesis to the people.
What do you see as the single most important piece of mystagogy you would communicate, were you the preacher or catechist?