Wind can be brutal. I think there a many different answers as to what people do when the wind gets really bad. Most full timers just sit it out. No big deal. Many weekend travelers have to be someplace and just have to keep going.
I was in some really memorable cross winds on I 10 in Arizona. It sure can be exhausting.
There are a lot of after market devices and a wide range of opinions about them. I found that putting a new bell crank, motion control units, and a steering stabilizer on my NEW coach was a great investment. There are also rear mounted sway bars which are popular on a lot of models.
IMHO, if you've driven your rig 12,000 miles under normal conditions and have been happy with the way it handles... you'd be OK just accepting the impact of the wind as something you'll try to avoid. On the other hand... if you're a gadget lover and tinkerer like I am... you'll want to start the process of making sure your coach is handling as well as it can.

Budget is a big consideration in all of this.
Best of luck...
Rick