Well I appreciate your concern guns. However, I have no choice but to dry the buds outdoors. Trust me, if I had the choice, I'd dry them indoors.
I only plan on drying them outside for less than a week, and then moving right into an aggressive curing stage. What I mean by that is that I will be airing the buds out in their jars several times a day for the first week or two, then once a day for a few weeks, then occasionally after that.
The area that I plan on drying these buds at gets lots of moving air through it, as it's in a valley to begin with.
As far as drying the buds in the sunlight....I don't think so.
That's one of the many reasons that Mexican brick weed is so horrible. They just cut down the plants, throw them on the ground, and let the sun bleach the hell out of them. This is also a reason why Mexican brick weed is so weak and tasteless.
I understand what you're saying in wrapping up the buds, but the built up heat of drying vegetation coupled with no air flow is just asking for mold and weak weed.