Don't bother with a flash...it'll just waste your battery.
I imagine it'll be dark, so...
Try fiddling with the settings so you can get the maximum exposure without it getting blurry. If you have a manual mode, open up the aperture all the way, put the ISO as high as it'll go without grain-ing out, and then try a few different shutter speeds to see where you can get bright enough shots that don't streak with camera motion.
Concerts are a real pain to shoot, in my experience.
Don't bother with a flash...it'll just waste your battery.
I imagine it'll be dark, so...
Try fiddling with the settings so you can get the maximum exposure without it getting blurry. If you have a manual mode, open up the aperture all the way, put the ISO as high as it'll go without grain-ing out, and then try a few different shutter speeds to see where you can get bright enough shots that don't streak with camera motion.
Concerts are a real pain to shoot, in my experience.
Actually, I'd recommend just cranking up the ISO as high as possible regardless of whether the photos end up pixellated. Getting a clean shot is more important than graininess or anything else. I'd rather have noise than blur.
And you're right, concerts are the worst to shoot. I wouldn't bring my dSLR to one, either, which then makes it even more difficult.
since its general admission, get there early and get as close to the stage as possible. the closer you are, the easier it's going to be to get a clear/clean shot. regarding the flash, try it both ways -- it might work if you're close enough. definitely kick the ISO up if you can.