My experience was a bit like Katie and Ishi's.
Tried leaving it out for 3 weeks before season some years ago to see if I could get the deer used to its presence. Used tent stakes and tied off all the tethers. All was well until we had a thunderstorm rip through my "windy prairie" at 50+ MPH.
The tent stakes pulled out, three of the fiberglass rods snapped, and the blind pivoted around to contact a lone strand of barbed wire, resulting in a couple ripped holes.
Got it fixed up (except for the holes, which still serve as a reminder), but I will only leave it out on my property for a night or two during turkey season... with an eye on the weather!
Joey seems to have it figured out for his area, but the frequent stiff winds here make mine a temporary set up. LOVE the blind... just cannot afford to buy another!
Daryl