Terry does a lot of that, so maybe he will remember some secret way.
The way I do it is by creating a number of folders on my flash card using the camera, I can then select a particular folder for a photo session.
My Canon 600D allows me to do this, your camera may not.
When copying to my PC with FCCM, I can click the image quantity on folders to get the square brackets I don't want to copy or do them in turn to copy to different named folders.
However, I don't do this very often, only if away from home or shooting in different situations during a day.
I usually delete items from a card before going out with my camera and I have no need to worry about "losing" images because I copy to my C-drive and another external drive simultaneously with FCCM. I backup my C-driver regularly too.
Terry