Absolute you are indeed a good host for these events .
But my idea is a playdate in halo:reach with lots of costum maps not based on killing but based on fun.
For example i have a gametype +map where you have to drive your warthog down a ramp as the survivor and the zombies task is simple to stop the survivors. But the fun part is the warthogs will go faster and faster because of the teleporters at the bottom. eventually you will break the soundbarrier XD