It is worth always keeping in mind that it is usually extremely difficult to stop a vibration once it has started, if you maintain the conditions in which it happens.
Most wheely vibrations happen at certain speeds, or 'harmonics' of some speed.
But, it can be fairly easy to stop a vibration from starting up. Those anti-snaking devices on caravan draw-bars are a good example, and so are steering dampers. They prevent the initial movement from building up into an oscillation, and so no vibration.
Even soggy bushes on a steering damper might cause a really horrible vibration right through the steering.
CharlesY