You have already answered your first question
Yes, some of our clients simulated a similar collision with a car. To do this, we added Decay options in the Wind helper settings to limit the effect of the wind. And you just need to link the wind helper with your car.
There is no special tool to simulate shaking bushes and trees, but in the future we plan to develop it.
Try baking reaction points with the Bake Direction tool in the Object reaction modifier. I'm not sure that this will help you in your case, but you can try.