Here in MD wind restrictions go up on our bridges over the bay and rivers at 40 mph sustained, meaning no house trailers can cross.
I can only tell you from experience towing our former Windjammer TT (34.5 feet long), at above 20 mph sustained, it was a TON of work and exhausting.
DW and I did a return home from the eastern shore/ocean of MD to central MD in 25 mph sustained winds. I hurt after getting home, plus more than one white knuckle moment was had as gusts hit us. Our sway bars surely helped, but it is still just a sail behind you. I am sure you know this already.
Good luck and safe travels.
(SOB) 5'er - Alpha Site
TV - 2015 F-250 Platinum (Betty)
Overnights... 2016 - 18 (so far), 2015 - 23, 2014 - 7
Deciding if the full time lifestyle is for us...