I never do. I've never had a Hoosier slick even with a tube want more than .50 oz. Lay enough rubber warming tires every pass you'll be balancing tires every track day lol!
I have an older late nineties Hunter balancer and it won't compensate for the tire being wadded up at starting line or the growth of a racing slick carcass during the pass. But I could put on one heck of a balance for the return road.