My standard model of running an adventure with a handful of characters is sort of like this. 1 - Referee describes the situation through the characters' senses. 2 - Players ask questions for more information, most of which can be given. 3 - Players take personal action with their character.
Delegation Style Play
A free post, as it's mostly thinking out loud about how to make large scale expeditions and enterprises feel different to the small-group stuff.