You can't make it easy on them if you CTB suddenly. I plan on moving to another city 2500km away and staying there for a few months with little to no contact with family, I'll take up a small job in a hotel/restaurant, plus climate there is great, it doesn't exceed 24 C and abundant rainfall, I'll live my last months there. This will slightly reduce the grief my family will go through when I die, I hope.
Also, if you happen to get very sick and are hospitalised or at bedrest for months, your family will watch you waste away and it might also reduce grief if you CTB after a crippling sickness. A cousin of mine had organ failure and he killed himself in hospital bed by detaching vital tubes on his arm.
I am of course not suggesting that you expose yourself to STD or delta coronavirus, it would be foolish to voluntarily cause it, terminal illnesses happen by chance and probability.
In any case, your family will grieve you, but not more than a couple of years, they'll live their lives without mentioning your name.