how to put specific info in a second column

Hi,
For I client I am designing a site, and before I show her the design I would like to make sure what I want is possible.
Some of the pages have a ‘normal’ text, and besides that some practical information like date, location etc.
I want this practical info to show up in a second column.
But I don’t want the client to have to go the html-editor and add something like a div with a specific class.
Is there a way to add a different field in the text-editor where she can add the text that should show up in the second column?

Thanks for any reply!!