Prtrait Christmas Light Combo Questions

[themaze76]

We have an enormous christmas light display near our home. Basically, they decorate a whole street of houses like the Griswold's in Christmas Vacation, it's pretty ridiculous, but fun. Anyway...
I'm taking the three little ones there tonight, an my fourth baby (D300) as well. I've been thinking about how I could get a few good shots of the kids in front of the lights, which is challenging.
I'm looking for a few pointers. Especially on what to meter. (BTW, I plan on bringing my nifty 50 and an SB600 to use off camera.) I'm thinking rear curtain sync, but other than that, I'd love some ideas.