This depends on the lens you'll be using. If you've got a fisheye or around 18mm-25mm, I'd point it straight up (zenith). Something longer i.e standard 35mm-50mm then I'd go for something around 20 degrees above the horizon. You can get some really nice shots if you decide to frame a foreground object like a tree or water feature, like a pond or dam - nice reflections. Depends on how creative you want to get. The orionids generally has a peak 20 an rate so don't expect to easily capture one. If you've got an all sky camera your chances improve.
Certainly don't waste your time by pointing the camera at the radiant. You'll see more overhead or in the NW. I've wasted plenty of film before and I intend to do it again.
Chance of getting one of film is the fun. If you're shutter aint open, then you wont capture anything.
http://www.spaceweather.com/meteors/...phototips.html
General tips.