Balancing Trailer Tires - yes or no

Yes, you did the right thing by having them balanced. Balancing should be included in the cost of the tire and installation. They were trying to cheap-out of you. Sure, you won't feel the out-of-balance tire in the tow vehicle, but the trailer will sure vibrate and bounce and shake things inside!

You did the right thing. Good for you for insisting they do it right!