Anyone make a "decent" enclosed trailer?

I've got a Wells Cargo 7x14 and it's charcoal gray also. It looks just like yours does in the sun. I've been thinking I need to figure out some way to read the wrinkles and use it as a thermometer! I suspect the warping is less on a white trailer. Dark colors absorb more heat probably causing the aluminum to expand more resulting in greater distortion.

Edit: I find it interesting that your side door is on the left side of the trailer. Was that an option?