Its Very important especially with Truggy/MT tires.....Yes the newer gen tires are A lot better then what they used to be but still aren't perfect from bag to bag.
I also balance my buggy tires.

Very important to run the tires for a quali or 2 prior to balancing to allow the foams to seat...if you want to be anal mark them Brand new then run them and re-check to see what the foam's been up to.