I have a similar design wall (batting wrapped around a drywall board) that is portable and easily tucked behind my table to save space as needed. But, I actually have two, identical. when not in use, they just stack in front of each other and even when tucked behind my table, i can still use the top half for small design needs. however, I can pull them out easily and put them side by side, which gives me a near-queen sized design wall when needed.
Even small quilt rooms can still be efficient! Glad you found your strategy!