Something I noticed about reality shows...

Watching the Amazing Race and occasional season of Survivor, I've noticed you never see the cameramen in these shows. You'd think in either show a cameraman should be seen in a shot or two each episode. If you watch Iron Chef (Original or America) you can always see the close up camermen on screen. I realize there's a lot more room on shows like the Amazing Race and Survivor as well as a lot more footage that can be edited, but it's just something that's bugged me lately, makes me wonder how much (if any) is reshot so a camerman isn't in the shot.