We deal with winds up here all the time I have a similar set up to Ken /Claudia.
IMO a long wheel base heavy TV is the building block to combat sway. A quality hitch with sway control makes up the second part of the equation.
Some may say that the hitch I have is overkill for an 8800# 29' trailer I say it is just right. The combo remains rock solid when opposing traffic (tractor trailers) passes.
I have never canceled/delayed a trip due to wind, that is not saying I never will though