The site oysso.com would cater you with dynamic QR codes. They would cater you with complete flexibility as a short URL would point to the content enclosed in the QR code. You would have the option to modify the files or links stored in the QR code without the need to generating and printing the codes again.
You should rest assured that Oysso would enable you to save considerable resources. It would also enable you to respond to all made changes in the campaign in the least possible time. You would be able to make the most of the services offered by the site completely free.