We use an anti-sway bar, not to correct any swaying situation. We've towed without the sway bar and have never seen sway with the Casita
. We have it for the occasionally rare emergency event.
When you drive to Newfoundland you must drive thru a section called Wreckhouse, named for an event where a locomotive was blown off the tracks by the occasional strong winds in that area.
We personally have come upon two semis blown over in this stretch of road. The winds can gust up to 200 km/hr... truly hurricane force. The locals tell you to never park parallel to the mountains in that area.
Though they have a warning sign, they have no active alarm like one sometimes sees on the Oregon coast.