There's no "honorable" way of doing it, but there's ways to minimise the damage on your "loved ones".
Best mate in high school was found by his 14 year old sister when she came home from school with their parents at work...that was a mongrel act.
My father texted my daughter that he was going to see her on TV (performing in Sydney), waited for my mother to have a shower, then took his .22 out into the shed. Sort of flubbed it a bit, as Mum found him still barely alive.
I was advised by my bro while travelling down to the big smoke to have tea with my family before my daughter's last performance, and was crushed while trying to get my wife to a quiet spot to tell her, daughter comes up with a phone "look at what Grandad texted me"...Had too many living people that I had to look after that day instead of dumping them in Sydney and racing 5 hours to the bedside of a guy who triggered the reset button, and still get "you weren't there", nearly three years later.
The cops said that late November early December (in Oz) is a bad time.
That same particular weekend, an aquaintance of my mother (friend of a friend) lost her husband to suicide, and one of my brother's employees Dad's was wiring up christmas lights to the pergola, and decide to wrap the cords around his neck and step off the ladder. He got cut down in time...
As to "honorable", Dad's brother appeared to go to work one day, normal work clothes, normal work bag...'cept in it he had rope, his driver's licence and a mobile phone...went to a secluded area and did the deed...the Police tracked the phone and found him/identified him...not exactly honorable, and not nice to the Police who found him, but not wife, sibling, offspring.
I dunno whether they would have done things differently if they knew how many hundred people would be there to see them off, or whether living with the black dog for a long long time means that you are totally alone in a sea of people and it's virtually inevitable.