I've used Peat and had a party of 16. He was fabulous. A great buy for $30/person. His crew is very personable, entertaining, and they take you to the major sites in Ochie. After the scheduled stops (which includes the admission to Dunns Falls <$10>), usually over by 12:30, they will take you whereever you want to go for the rest of the day.
I have two other friends I've recommend Peat's tours too and they also had nothing but positive remarks for Peat. BTW: Peat isn't a one man operation. He has a team of people and buses/vans. He's a fairly large operator in Ochie.