Surprised no one mentioned this, but you might consider re-checking the adjustments on your sway control and weight distributing hitch. Too little sway resistance, or too much weight transfer off the front axles of the tow vehicle, could make a difference. Or, perhaps the TV and trailer were loaded differently on that trip?
We live in the flat-lands (north Ala) but have made two trips out west in the last 24 months. I have my EQ hitch set very tight. I can feel 20-30 MPH side winds but they are not much of an issue. But every time we go thru NM and west TX panhandle we get into 40-45 MPH winds, and that will get my attention. 2-3 hours of 45 MPH gusts and I'm ready to stop for the night. I can control it, but it just isn't fun.
