I found a gazillion reference pictures for the fairground. Most of them have similar lighting (cloudy sky around dusk with lights from the rides) but they vary enough that we should probably pick just one or two to work from, I just wasn't sure which. I put them all in a folder called "Reference Images" in group storage. And there are even more here: http://www.flickr.com/photos/10thavenue/sets/617252/
And here are a few from the folder that I thought might work well.