In my early days of camping, I'd been caught by rain near the end of the day while setting up camp. At that point I'm already wearing rain gear which had been at the very top of a back pack or quickly accessible. The tent has been rolled up so and has been the next item below rain gear. The end I want facing the wind is on the outside of the roll and can be quickly staked out to prevent wind from blowing the tent away. The fly is partially clipped on at the same end for the same reason but also also to keep the rest of the tend and mesh as dry as possible. Using this procedure the tent goes up quickly as it is not necessary to sort tent or fly to figure which end is which.