I am in NO way an expert, but have had some fun playing at this before, unfortunately I have been under clouds the last 2 years of persieds.
1. When taking star field shots those stationary stars have a chance to 'burn in' on the sensor at lower ISO's.
2. However, because meteors are fleeting you are going to want to pump your ISO to catch them.
With the 5d iii you'll be comfortable shooting at around 6400 and adjust your shutter/aperture to your preference.
I'd say start at your widest aperture (1.4, 2.8, 4) then adjust your shuttter til you get a decent exposure.
This may mean a fairly short shutter speed. However, if you have an intervalometer you can set it to keep taking MANY shots.
You can then stack any shots that captured a meteor in PS and 'paint' them into one image. (layers are your friend)
If you want to get a 'radiant' shot, aim your camera up at Perseus and you'll get a radiant/starburst-y effect.http://www.flickr.com/photos/mikegardnerphotography/8273529497/#
With the 7D i wouldn't go over 1600 ISO, too much noise. 25-30 seconds at 2.8.
If you still want more detailed instructions just google 'photographing a meteor shower' there are TONS of resources on the net.
your initial set-up idea looks good to me.
5DIII + Sammy 14, at 2.8, 30 secs (probably much less), ISO 6400 (or the 16-35mm)
7D + 10-22, at 10 mm 3.5, 30 seconds, ISO 1600
I'll be shooting with both my 6D and T3i this year, I'll probably do a radiant timelapse with the 6D and set the T3i at several different parts of the sky.
Find something 'INTERESTING' that you can put in the foreground...tree, rocks, skyline, etc.
Maybe try some light painting...take a flash light and paint the foreground objects with light to make them pop. If you leave the camera in the same spot, you can then composite the foreground with any meteor shots in post.
Above all have fun.
Cheers and enjoy.