If GAF wants to farm the Dino D-Day one I can help as I already got it. You need to pick up 15 presents dropped when you kill players on the Snowy Park map in a single game. Someone should create a private game for it so random people don't start trying to play for real.
There were like 5 empty servers with the map when I did it (after you left that one server with people on it =p)