I used Harbor Freight drop cloths. the sewn seam is real thick so i cut it off.
At the seams on the tear, I overlapped the canvas about an inch.
Glued it down w/ titebond and painted. worked ok for me.
The seams are on the roof (7' off the ground) and just above the doors on the side.
No one has noticed or at least haven't commented on them.

Sam