We rented the track for the hr. Can't remember the exact cost, but it was in the neighborhood $65-$80. I had a blast!
The only thing I'd maybe like to do differernt is maybe drive up and spend the night and drive home the next day. It's VIR, so Im sure there is plently things we could find to do.
It's a long drive to go up for a few hrs, then turn around and drive home. Either way, I'd still do it