We use the plastic tarps with the re-enforced eyelets, found at home improvement stores.
They sell them in a variety of colors (blue, brown, green, or double sided colors) sizes: 10x12, 20x30, 30x40. Can either attach the tarps in place with screws, staples, or cable ties.
We've been building a haunted maze for 10 yrs. Please don't hesitate to email about this. Can setup a time to chat, if you want as well. Our maze is housed inside a shed 37x82x25. Last year's maze was 3,000 square feet.
painters plastic is very inexpensive and comes in average rolls 12x400 light weight and easy to use yty using spray adhesive on your 2x4s I did this with pvc pipes after a decent wind my plastic is still on the walls