So I've tied my awning down, and I've left it untied. I use two large corkscrew stakes for dog leash stakes (got 'em at the pet store) screwed into the ground under the awning arm end points and then just run a ratchet strap from the awning down to the stakes. I try to be gentle when ratcheting it, you want it snug, not pulling hard. My straps are bright green, so while it could be a trip hazard you'd be hard pressed to miss them.
Now, that being said, I'll share my bad experience. Was coming home from a bike rally several years ago with our old toyhauler. Stopped in Wyoming for the night and tied the awning down (we like to park the bikes under the awning so they don't get rained on or dew in the morning). The wind kicked up pretty hard and it actually blew the awning, not up, but "sideways". So it kind of folded the awning and the arms back against the side of the rv. It caused some minor damage to the arm mounts at the bottom and the end caps in the main roller rail at the top where the arms folded up weird. I was able to fix it so that it still worked correctly, and unless you looked hard you really couldn't tell anything happened. But in the end, my advice is, if the wind looks sketchy at all, roll that awning up!
Now days we generally camp (19 times out of 20) at our family property out near the coast and it is surrounded by a line of trees that break the wind real nice, so I don't have to worry about tying it down there. But I do still keep an eye on the wind. You know, just in case. Don't wannna do that again!