I have a design “wall” of 4 foam boards, and originality my plan was to hang it permanently. But I have found it very handy to lean them against the wall (i don’t make big quilts) and add to the width with more boards when necessary. Also mskes them portable so I can set them up next to my machine whenever I want.
I use batting and pin it on with straight daisyhead pins, if I need that last piece of batting, it’s there.
If I were renting and the design was something to be really big, I’d use duct tape to affix the batting , and Command strips to hold the boards up.
I think batting would tear away from staples.