This Friday my school is doing a senior sponsored tailgate, we do them every game but this time they decided to announce it to everyone, and I am getting some pictures for the paper. I'm not entirely sure as to which ISO film I should use. The tailgating starts at 5:30 and ends once the game starts at 7:30. Weather.com says the sun will be going down at 7:13 but I'm going to double check tonight. I think either 100 or 200 will be fine for the lighting conditions but once the sun is right at the horizon I don't really know what I should do. Also I don't have much experience doing people and was wondering if there were any techniques you use to capture real moments, rather getting an unwanted pose. I will be using 28-105mm and 17-40mm lenses. Should I use a flash? I currently only have the build in flash and I can't use it with the 17-40mm. Thanks.