It would be cool if both avatars were dressed up as the criminals. Like black outfits, weapon of some sort...
Good idea! The gifts sound cool. The avi's also sound cool. How about a little ghost gift as well? A boo? There should be special Avi's as well, as maybe a Psycho wielding a knife or Scream (changing it to Scræm or Screech).
Want to make this hunt even better? Change when the damn thing ends. Last halloween, and christmas, and every other hunt, it ended a week after the holiday. Have it end so we get the damn avatars a day or so before the actual holiday.