Don't let a flapping tent ruin your sleep
Can’t stop the bottom edge of your tent flapping noisily in the wind on stormy nights? Try loosening and tightening the straps, or re-pitching on level ground (not that we have any of that in New Zealand!).
If that fails, tie a cord with a clove hitch around a bunch of the nylon at the bottom edge of the middle of one face. Peg it out about half a metre. This works best if it’s the vestibule face (if you lift the bottom edge of the tent too much above the ground driving rain can get under the edge). If you are a bit rough, just chuck a rock (5-10kg) on the flapping face and deal with it properly in the morning.