Originally Posted by Shelb
your filmspeed is the issue (1600). ISO 1600 is usually best used for low low (no) light conditions where you aren't able to use a flash and really just want to grab some quick photos of your experience. Lower filmspeeds will provide cleaner results.
In this case probably not. Lower iso's with 300mm lens would result in even slower shutter speeds required for proper exposure, and would be virtually impossible to handhold, resulting in a blurry mess. 1600 should be very usable with most modern DSLR's, and really a tripod would have been the biggest help. You still need fairly fast shutter speeds to freeze the subject and prevent motion blur. This coupled with the lower light, pretty much requires a high iso. Using a tripod (or some other support) would have allowed a slightly longer shutter speed and a better exposure which would reduce noise.