I ride a V-Strom and Tiger 1050 over the Tobin bridge over Boston Harbor regularly - it's 250 feet high at peak, and Boston (little known fact) is the windiest major city in the US
(although big gust happen everywhere). The bridge stanchions do break it up a bit, which is why I'm here to talk about it.
Adv bikes are on the tall side and have windshields and bags that increase their profile. Both my bikes have substantially upgraded suspensions and that helps a lot. I've tried canting my body into the wind, leaning down on the tank, etc etc. Only thing I've found that helps much is to grip the tank really hard with my knees. Have to think about why
Doesn't sound like much of anything could have helped the OP.