However, be aware that canvas tarps are a bit heavier than your typical polyethylene tarp and can be a bit harder to fold when the fabric becomes a bit stiff. They're also a bit more expensive ...

Scott Russell bought a canvas artist tarp in 2008 and festival attendees have been drawing on it ever since. Friends have contributed to the artwork, Russell says, as have strangers.

However, be aware that canvas tarps are a bit heavier than your typical polyethylene tarp and can be a bit harder to fold when the fabric becomes a bit stiff. They're also a bit more expensive ...