The victims of the Margaret River mass shooting have been laid to rest in emotional twin funeral services in Bunbury, Western Australia.

Around 150 people, including the father of the four children killed in the massacre Aaron Cockman, packed into the Crematorium Chapel to say goodbye to the victims.

Peter Miles, 61, his 58-year-old wife Cynda, their daughter Katrina, 35, and her four children - daughter Taye, 13, and sons Rylan, 12, Arye, 10, and Kadyn, eight - were found dead at Forever Dreaming Farm in Osmington on May 11.

Aaron Cockman was comforted by loved ones. (AAP) (AAP)

Mourners met at the Crematorium Chapel in Bunbury. (AAP) (AAP)

Seven members of the Miles family were killed in the murder-suicide. (9NEWS) (Supplied)

Three guns licensed to Mr Miles were found at the hobby farm and the family all suffered gunshot wounds.

Mr Cockman was embraced by loved ones as he arrived at the service, and supported by his father.

"I don't feel anger, I feel tremendous sadness for my kids but I don't want anyone to feel anger," he said.

Mourners heard tributes to the children and their mother.

A second service was held same location later today for Peter and Cynda Miles.

Margaret River Shire President Pam Townshend attended the service and said the pain continues to be felt by the wider community.

"The funerals will be an important part of the healing process but we know there will be much longer road ahead for many,” she said in a statement to 9NEWS.

The family was found dead at the Forever Dreaming Farm in Osmington. (9NEWS) (9NEWS)

A funeral for Mrs Miles and her children is being held today. (Supplied) (Supplied)

"Today is about those who we are farewelling and those closest to them. We want to offer them a respectful pause for this day and provide everyone with the space and time that they might be needing."

Friends have said Peter Miles "couldn't look after his family" and felt a "sense of failure".

Mr Cockman, who was embroiled in a bitter dispute with his estranged partner over access to their children, previously said he believed Mr Miles planned the murder-suicide.

Mrs Miles and her four children. (Supplied) (Supplied)

Mourners brought floral tributes to remember the family. (AAP) (AAP)

A second service will be held for Peter and Cynda Miles. (AAP) (AAP)

Mr Cockman speculated that Mr Miles, whose son died years ago, could not bear the thought of losing his other son Neil, who has a serious kidney illness.

Tributes posted on the funeral company's website included Diana Lokken and Jay Jennings, who said they were saddened to hear of the sudden loss.

"We had so enjoyed the lovely breakfast at the farm and chatting with all your family during our visit to Australia," the message read.

Phil and Debbie, who did not give their surnames, said they were thankful for many happy family holidays at the farm.

"Seeing our children grow and grandchildren arrive, through the happy times and through the sad times, you've always been special friends," they wrote.

Premier Mark McGowan said the state government contacted the families immediately after the tragedy to offer financial support for the funerals.

"It's a very, very sad day for the community," Mr McGowan told reporters in Perth.