This is a hosted stay through Hipcamp, below is the information provided by the Host regarding their offering.

Mira Wines is a private, boutique vineyard in Pokolbin, Hunter Valley, specialising in boutique small batch wines, greek style olives and limoncello. We now offer an area of the property for self sufficient campers and caravaners to base themselves and explore the beautiful property and wider Hunter Valley region. There are toilets and shower facilities at the cellar door , these are located away from the camp site but guests are welcome to use them . The views from our hill are spectacular.
Seeing early morning hot air balloons a common occurrence at Mira Wines . We are among a group of small family vineyard owners and winemakers with an immense passion for our vines and our wines . Properties like ours typically produce 1000-4000 bottles each year. That is just 120-260 cases each vintage. The vineyard is singularly hand pruned and cared for by the two of us.