Day for Night: Need Help

[steve green]

Hi Everyone,
I've got a shoot coming up in the islands and the client want to shoot some of our wider shots day for night. The tighter, more controllable shots we'll shoot night for night. My question being with my Epic should I use HDRx to do my underexposures and, if so, scenes which are backlit what's a good underexposure to start at. Originally I was thinking three stops. Also the client wants the BG to be on the blue side and flesh tones to be natural. I was thinking setting WB to 4000 or so, and use warmed HMI's for the talent.
Any suggestions would be very appreciated,
Steve

 

[David Mullen ASC]

Your plan is fine though I wouldn't underexpose that much unless you are trying to hold detail in backlit water with everything going in silhouette otherwise 2-stops under is plenty, you can always darken further in post.

 

[steve green]

Would you stay out of the sky or do you think with secondary control in post we can include the sky in some wide shots?