Will's can help you to block scenes, give tips on directing actors and help you solve problems well in advance of the actual shoot.
A weak script ruins any film. Will knows what works. He can spot things which won't translate well on screen. He will point out anything that may need to be taken into consideration. Often things you never noticed.
Some people like for Will to be there on the actual day of production. Most require him after to help them clean up their editing and deliver the very best film with the material they have.
Will guides a production through a weekend shoot and helps keep things smooth and on schedule.
Will makes sure that everyone is comfortable, that the production is on track and nothing is being missed. There's no need to stress, he's got everything sorted.