One might send invitations to every governor in the US and others to the heads of similar political divisions in other countries.
Then they might want to hold the conference in one of the finest hotels in the world. Gee, the Bilderbergers have lots of hotels in lots of countries and have specialized in just these get togethers.
They can cater to heads of state, academicians, lobbiests, bankers, even UFO conventions (if they can afford it) or any combination.
yitbos