Do you take 1 large card so less to carry, and worry about.
Or do you take multiple smaller cards so you dont loose all your shots if anything were to happen to your camera?
Canon -EOS 40D Lenses -EF 70-300 mm f4/5.6 IS USM | EF-S 17-85mm f/4-5.6 IS Flash -Speedlite 580 EX AF 580EX Mk II Printer -Pixma IP 4500 Bags-REZO 170 AW | NATURE TREKKER AW II WANTED -Canon DM 50 Microphone
Cards are so small there's never really a point trying to travel light by taking fewer. I have 55GB in all and it goes where my kit goes. The only time I limit myself to one card is when it's just me and the Fuji. Two spare batteries in one pocket and the cam w/card inserted in the other and I'm good to go.