I never give my clients the cards, mainly because I am completely insecure and copy the original images to a hard drive, maybe 2 hard drives before I even edit a single picture. I've lost data on corrupt cards before and not doing that again. If they want all the pictures, which I have done before, I just make them a DVD. It's their right if they pay for it. But to give them the original on the CF/SD card, is asking for trouble, especially if they don't know what they are doing. You can easily take your computer with you and burn them a DVD.