I say balance your wheels,for what it costs.
My car once lost its balance weights on one wheel,and the resulting vibration could be felt through the steering wheel and through the seat of my pants.
I sometimes wonder if other peoples disintegrating vans are the result of vibrations from unbalanced wheels feeding into the caravan while towing.You would hardly expect to feel this through the towbar.
I have just fitted new tyres to my van and they did not require much in the way of weights to balance,however the weights which were taken off from the original tyre balancing were quite substantial.