Pay attention to semitrailers. Some of them have rear axles several ft apart.
When truck makes sharp turn, one axle goes perfectly sideways, regardless only 2 axles.
That the price you have to pay having non-steering tandem axles.
For my low boy trailer, the issue was that nobody was making quality tires in the size. I was buying them cheap, but then they did not last.
Sure would be easier do what semitrucks do, spend $600 per tire, but run 1/2 million miles on it.
Bottom line, triple axle trailer is not best for turns, but very good for anti-sway.