Going back to the original question, canvas vs. mesh, I can tell you this from my experiences. I have a very old canvas awning that came with one of the trailers I have. I set it out, aired it out, waterproofed it, and packed it to use on one of our few camping trips. We set up at the campground with it, and the weather immediately turned on us. It blew so hard overnight that it rocked the camper even on the stands. The canvas caught the wind like a sail, billowed up and then pulled the stakes out and collapsed against the door. The lesson was that I never should have set it up that day in light of the coming inclement weather. Or, should have had at least 36" stakes for it. I haven't camped with, but have done an awful lot of trucking with a mesh tarp. It is surprising just how much wind a mesh tarp can catch. I've had one that caught the wind, billowed, and pulled right off the roller. They too will act just like a parachute, but don't try jumping out of a plane with one. All things being equal, either type will be equally subject to becoming a PITA in high winds. Tying off to a permanent structure like the fence will help hold it from becoming gone.
Thanks for your advice, ten. I ended up buying a mesh tarp after reading that canvas tarps have the tendency to stretch and rip in the wind. I've only had it up for a week, and we haven't had extreme wind yet, but it has survived "strong" wind. I'll post photos soon: I have it tied to four flexible PVC poles which are tied to a fence so I have my fingers crossed! I did end up attaching it with sail slugs for easy removal in wind-storms if necessary.