The open square known as "The Point" in Beaufort is where Ben finds his father drunk under a tree.
The Great Santini: Fun Facts
The Edgard Fripp Home (Tidalholm) used extensively in the film was also used in The Big Chill.
Stan Smith and his family, who lived in the house at the time, were contracted to stay in the home during the entire 3-month shoot. This wasn't so the Smiths could make sure nothing happened to the home during the shoot. Instead, it was a move to protect the movie company from being liable for damages that might have been around since the 1850s.
After the shoot, the film company repainted the house and refinished the floors.