A photographer says he had to jump out of harm's way while shooting a wedding in Sydney's south west as a man tried to run over the bride and her wedding guests.

Warren Donovan said he was shooting a wedding at Camden last night when a guest jumped in his Mazda 3 and drove towards two people, narrowly missing them.

A witness tried to take the man's keys when he then allegedly reversed at high speed towards numerous people, including the bride.

"I was shooting [the wedding] and we all dived into the garden," he said.

"It was crazy."

He said shortly before the incident the 55-year-old man had been arguing with other wedding guests.

The man did not managed to hit anyone with his car and no-one was hurt during the incident.

"Luckily he hit no-one," Mr Donovan said.

The man then left the scene and was arrested at about midnight while walking along a footpath on Camden Valley Way.

Police said they found cannabis on the man.

He has been charged with driving in a dangerous manner, menacing driving, disqualified driving and possessing a prohibited drug.

The man was granted conditional bail to appear at Picton Local Court on September 29.

Mr Donovan said he believed the man was a partner or friend of a relative of the couple.

He said the man was "not violent" and after he tried to run down one couple was actually trying to get away.

When asked if he thought the man was drunk Mr Donavan said: "Oh yeah. Well and truly."

While the couple were initially rattled by the incident, Mr Donovan said they tried to put it behind them.

"They sort of went we're not going to let this ruin the night," he said.

Editor's note (September 15, 2015): This story has been updated to remove the identity of the bride and groom.