We had a great game at DragonCon in Atlanta. We had a giant sword to give away and a mob of people who competed for it on a huge board. As usual one side had masses of orcs and each contestant had a single elf.
If anyone remembers how this went please jump in.
The only tricky part was managing the orcs cards and available stats. I think we used unlimited orcs of any clan but they were divided into bands. The board was divided into 3 sectors and in each sector the orcs were treated like a separate game. Separate hands/clans etc. I don't think there was any limit of the number of orcs with a single clan base type in one sector.