Worse case scenario, your Cayman becomes a Boxster Living where I do, I have never seen snow like that. Really hope everything turns out well and that it looks perfect once the snow melts. Please keep us updated once you get it out.
I've been trying to keep up with it, just taking some off the roof and hood.
And its snowing again and again on the weekend. You guys are getting clobbered.
Personally, I would not be so worried about the weight. I know people shovel snow off house roofs. So it would make sense to get heavy, wet snow off the car when you can. But I wouldn't panic over it. I'd just do it when I could. I'd be more worried about falling snow from trees and high structures, like this story up in MA
Snow Falling From Roof Crushes Cars In Charlestown Â« CBS Boston
Now your car cover is different. Picture 3 shows wet. It depends upon your temperatures and how often the wet thaws and refreezes. If you are constantly below freezing, and then the sun melts some snow during the day, and refreezes at night, then I can't see how that can be good. I have seen car covers freeze to the paint surface. Sure, they melt but off comes some fabric. Its something you might not want to see. Constant freezing and rethawing material of any kind to the paint can't be good for it.
I also don't know how long you had the car sitting there, in low temperatures. You got to be running -3 or -4 at night and teens during the day? I hope you got a battery tender running to that car under all that snow, or dig it out and run it now, because if not, you know that battery is going to die in those temps if it sits too long. Just do a search here on dead batteries. There are many threads.
With your outside temps, I'd would do just that, leave a "small" cover of snow, until you get a good thawing day. Then remove the cover and leave it off as the temps move up and down around freezing while everything is wet. Freezing anything to paint just doesn't seem like a good idea. The snow won't harm anything. Of course, salt will.I haven't checked under the cover to see if its wet or not, maybe if I leave it covered with enough snow it will insulate it from the sun a bit and keep a steady temperature underneath.
Good point about the battery, hadn't thought about that. I drove it last two weeks ago, will have to dig out and put the battery tender on it.
I am a few towns away from the OP...and opened the garage for the Porsche to take a look...she decided to stay inside...I lived in CT for 20 years and remember one year we had so much snow I couldn't get the car out of the garage because I had no place to put the snow in my driveway! The town had to come by with a back hoe and dump truck just to clear the road. I think the mounds of snow finally disappeared some time in April.