I have a suggested location... Maldon, Victoria
I spent some time there today doing some photography. It is a nice run in from the Freeway, and then a nice ride out towards Castlemaine, or Daylesford depending on which direction you need to go.
Not sure where, the hotel seems nice, but not sure about accommodating lots of people for Lunch... the Maldon Cafe was nice, a bit slow on the food, again not sure about how many they can accommodate, they are right next door to the hotel.