Nice Kansas Tribute!
Yes and no about 5ers....no sway because the of the hitch being over the truck's axle, but also higher profile...I don't get any sway either with the Arrow hitch, but 32' is still a lot of sail area. Wind doesn't generally bother us at 20-25 mph, but last year coming down I-75 through Ohio we had crosswinds that had to be in the 30+ range with gusts at 45+...I usually run at the 70 mph limit easily, but when you see the semis in line at 55 mph, I did the same. Scott is correct, the effects of the wind were much less at 55 than they were at 70.