I took the plunge and used big sticky notes (available at office supply stores) instead of my usual dry-erase board. These things are close to the size of a flip chart.
They are just the right size to be rolled up and taken away. Many of my students have told me that people then bring them back next time to talk about "Toward" moves.
I won't give up my trusty dry-erase boards completely, but these big sticky notes are cool.