Location lighting setup

Hi guys,

Just want to run it by you. I'm shooting a Christmas party, few hundred people.
I have a decent location outside of the main traffic, but very visible to anyone who wants to take a picture.
Here's my setup:
Key light (studio light) in a softbox (2' by 2'),
Fill light (580EX II). Shoot-through umbrella, I also have a silver umbrella to bounce light off of.
Background light (430EX) either gelled or could be through an umbrella.
Background is black with some white snowflakes ornaments (provided by the client)
Background light is on a short lightstand (36" max)
I think the best would be place key light to the left and high of camera, fill light low near the camera axis and the background light to light the background or use as hair light.

It could be for individual, couples and small groups.
What do you guys think?

Thanks a bunch.

I dont think a 2' x 2' softbox is going to cut it for small groups.

If I were to approach this, I would have large modifier (47" octobox or 60" umbrella) as my main light, and I'd have it high and behind me so that all the subjects were exposed relatively close to the same.

I'd get the subject far enough from the background that the unavoidable light spill didn't wash it out, and i'd bring in the background light from a hard angle so that the white snowflakes really poped.

Positioning the fill light "low" will give your subjects wearing eyeglasses major reflections. The usual position for the fill light is high and behind the camera which normally will not give you any reflections in the eyeglasses.

Benji