Lutheran Service Book: Altar Book, p. 530:
8. The biblical gesture of hands uplifted and outstretched is appropriate for the pastor during the chanting of the Easter Proclamation. An assistant may hold the Altar Book for him. To convey the spirit of exultation, it is preferable that the entire Easter Proclamation be chanted. [emphasis added]
The Exsultet (pages 533 and following) is not an easy chant to master, and since it is only used once during the course of the whole year, this is your reminder, dear pastor (or assistant), to begin PRACTICING even now. It is *almost* like the normal Preface tones, but note that unlike any other Preface of the entire year, this Preface uses FIVE notes (instead of four). If you practice it a bit, you'll get a feel for that unexpected C - it is that unexpected note which gives this piece such a festive sound and, I believe, occurs only at the Vigil.
Don't wimp out, gentlemen. Sit down with your organist and or musician and have them TEACH you how it goes. You will NOT regret it.