here's a few ideas:
http://philhart.com/content/geminid-meteor-shower
that's a relatively slow lens for capturing meteors. to have any chance you will have to use it wide open (you're going to have to sacrifice image quality). the shorter your exposure the easier to extract any meteors from the background. ie longer exposures just makes the background brighter without effecting the brightness of the meteors.
don't expect to capture many even after a few hours!
phil