DiVine tours will organize a fantastic wine tour for you in the Hunter Valley. Siobhan guided us (we were in the United States) to choose exactly the wineries we were interested in, then she called the wineries and made reservations for us.
She picked us up at our hotel in a spotlessly clean vehicle, handed us an informative guide to the wineries, and off we went. At each stop she came by our table with 15 minutes to go to make sure that we wrapped things up and got back in the van for our next appointment.
After talking with us on the tour she even added an extra winery that she knew we would like.
I can't imagine a better guide or wine experience in the Hunter Valley. Siobhan was fun to talk with, and the whole day was well-organized and memorable. Really, stop wasting your time searching, just go with DiVine.