I can tell you from experience the best way I found was to really just do your best to take care of it, then when you get out of the desert use the air cans and go at it. No matter what protection you use you are going to get sand in it. Just do your best not to have it out in the wind and clean it as often as you can. BTW shrink wrap = bad idea. It's gonna be 120F outside and with no air getting inside you MB would fry in ten minutes, but I'm sure you already knew that.