I actually prefer being perpendicular to the wind. Being inline means a lot of wind-blown rain can get in.
Site selection is the biggest influence -- #1 safe trees! #2 out of the wind. (Better to have safe trees and deal with wind than the other way around.) Doors do help. Ridgeline under tarp does help. Rigging everything close to the ground minimizes the power of the wind, too.
One thing that really helps is staking the corners out with one guyline and down with another guyline; that way you don't get the tarp billowing and flapping up and down. Ideally you can also stake the middle of the side of the tarp down, too. The tarp will still move but not those big flap-snaps that are hard to sleep through.
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