Photography: Night Races = Dark Track. Any Tips?

[rcTom]

Ok,

So the owner of a track wants me to come out again to there track, but this time there doing night races. Obviously they have lights there for the racers to see, but its not sufficient enough to take pictures.

Gear i have:
Studio strobes w/ battery power pack
Speed lights w/ external battery pack
Wireless triggers
Stands

Should i do On of Off camera lighting?
If off camera lighting, Where should i put my lights?

I certainly don't want to blind the racers, so i have to make sure i dont point it there way.

Any tips or ideas would be very appreciated.

Thanks,
Tom.