you could try it with the walking foot if you want- just remember- the walking foot works with your feed dogs to feed the fabric through evenly-
the free motion foot works with out the feed dogs engaged- allowing you to turn-manuver the fabric without the feed dogs pulling on it.
walking feet work best on straight lines- fm foot works great for curves, designs.
it might be time to try it out on a small project....
but it is certainly possible to do what you want with the walking foot