Bob, I was looking for more durable CLEAR walls, i want light inside... the clear vinyl tarps i'm sure are as durable as the canvas tarps...
the part that gives out (rips, tears, call it what you like), is the sewn edges and the grommeted holes.
Year after year after year in the strong cold winter winds, it's bound to give.
4' x 8' Lexan or polycarbonate panels would be great, but the cost is the MAJOR factor, also, storing the panels in the warmer months.
i have only two sides on my pavilion this winter and it's serving the purpose...
i'm out of the wind and not too much snow enters from the east and north open sides...
anyway, good luck with your project.