I don't know a lot about herding, but I think Stosh had some posts about it. I know some of the obedience is different as far as what you need for a herding dog. I know for sure you need a reliable "down" from a distance.
I don't think it would hurt to call the trainer and ask them what you need for foundation. IMO, better to find out on the phone and not waste a trip/session only to find out that you need some basic stuff beforehand.
He is your friend, your partner, your defender, your dog. You are his life, his love, his leader. He will be yours faithful and true~ to the last beat of his heart. You owe it to him to be worthy of such devotion. ~unknown