Murdered Aussie tourist Sean McKinnon's fiancee Bianca Buckley writes heartbreaking tribute to her partner

The fiancée of the Aussie tourist murdered in Raglan has written a heart-wrenching tribute to her partner.

In a note released to Australia's Nine Network, Bianca Buckley said 33-year-old Sean McKinnon was "the light and love of my life."

"My greatest teacher. My protector," wrote the 32-year-old Canadian national.

Buckley and McKinnon were camping at Te Toto Gorge in Raglan on Thursday night when McKinnon was shot multiple times in an alleged aggravated robbery.

Buckley escaped the camper and ran for her life, fleeing to a house 2km down the road for help.

The van was discovered five hours later, 80km away with McKinnon's body inside, although the weapon used has not been located.

The pair got engaged in December 2017 after meeting while surfing in South America, reports The Age.

According to McKinnon's sister Emmeline, the couple had not set a date on when they would marry, preferring to get the most out of life before settling down.

"Bianca and Sean shared a passion for adventure and surfing and travel," she told The Age.

"They both shared the same sort of values in life."

Buckley told police she is focusing on the memories she has with McKinnon and the time they spent together before the traumatic event on Friday.

A 23-year-old man was arrested late on Friday and charged with murder, aggravated robbery and threatening to kill. 

He appeared in court on Saturday and was granted interim name suppression. 

Police inquiries are ongoing as authorities work to establish Friday's events.