My boyfriend and I are shooting a pro bono wedding tomorrow. We both have 5D Mark II cameras. With a 21 megapixel camera we have discovered that the file sizes are really huge. We have three 4 GB cards and one 8 GB card to share. We've already accepted the fact that we don't have enough space to shoot full RAW images. My question is, should we shoot the smaller, 9.9 Megapixel RAWs (which will give us a total of 1250 shots) or is it ok if we shoot 21 Megapixel JPegs (which will give us 3,000 shots)?