I figured Sunday was for warbands, one nice sized table, everyone brings their warband, chooses appropriate sides and has at it. I'm guessing a fairly even split with some strong and some weak warbands on each side. It will be chaotic, but fun, massive multiplayer games sort of take on their own turn sequence naturally.
Anyone not joining in will be free to do as they wish.
Saturday would be entirely what people want to do, I seam to have landed myself a 2000pt battle against bugs undead so that's me sorted. Let people tout for their own games, sort of like a day long club meet. I'd hazard a guess joining in with others games for those with a few pioints short of an army shouldn't be impossible.