In my campaign, the Iron League's greatest secret is that they are advised by a Gold Dragon who is (even unknown to the top tier of the Iron League) Cobb Darg. Most think Cobb Darg is a dwarf, but is actually polymorphed. So, when the Iron League top committee meets with a Gold Dragon for top secret meeting...like Clark Kent when Superman is around, Cobb Darg has some excuse for not being around.