Car cover? Is there a decent one?

I park my car for a few months at a time in a field next to different Ethanol Plants. The "fallout" from these places is acidic and eats the paint from everything over time.

I don't have a perfect car, but I'd like to keep what I have. I need a decent car cover that fits pretty good, and won't blow off as I won't be around to check on the car daily... Or weekly. Plus, even though it's been pretty much a crime-free experience, covering things up can't hurt.

Up until recently, I had a deal with another worker that was around, who would take the car once a week or so to get washed and things taken care of. That's not going to work anymore.

 

I ordered one from carcovers.com a while back and I like it but had to add the clips to keep it from blowing off.

I've had some minor issues. They sent me a code for $10 off after I received the cover which I thought was kinda crappy, I'd been getting emails from them for a week or more before ordering... I thought the cover would do OK on its own, without the added clips, and got a phone call from a coworker that "The condom had slipped off my Penis." He fixed it, and it was back off when I got back to the car in 12 hours. The security lock kept it from blowing away though.
I had to use my brain to figure out how the lock was supposed to go. It works fine, it's just a cheap little lock, but their website does nothing to explain installing it. (After I installed it, I found their videos about how to do it.)

Mine is the thicker one, but it's good quality and seems decently made. A thinner one would be just fine for protecting as well IMO. I'm really also only stopping UV damage to my headlights.
My car is parked in an open field in Michigan, and the wind can get pretty nuts, so I have a bit extra to deal with. I'm hoping that this will stop me from having to chisel the car out of snow and ice if I want to drive it in the winter. I'll find out soon.

It's not "fitted", but the website explained that was fine. It does have elastic all the way around and doesn't seem to be cheaply assembled. There is even a nice label for the front.

The code they sent me was 10offos, the email says it's only good for one day. I just tried it, and it still works.

My total was just over $200 with the clips, but I got the thickest one, there are options half the price on their site. It also wouldn't be difficult to add cheap grommets to the corners from Harbor Freight, and just use cheap bungees to do the same thing. In the end, it would save you ten dollars. Shipping was really fast to Michigan, only a few days, which lately is insanely fast. (I've waited months for other items.)