I am filming an outdoor wedding reception with limited equiptment and could use some low cost lighting tips.?

I have filming and editing background and have done video's for people before. Unfortunately lighting is not my forte... I've never had to really worry about it before. But now all I have are some hand held DV and HDV cameras and some tripods. With it being an outdoor "twinkle lighted" reception I'm worried I will have bad quality footage. Changing the exposure on the camera will only do so much. What can I do to make sure I can shed some light once the sun goes down? Any tips would be greatly appreciated.