Hi Leroy Jenkins, and welcome to the fray
I don't really understand the point of proper graves. They allegedly help to remember the deceased ...
It's a carryover from ancestor worship\reverence, still seen in other parts of the world. Certainly the practice of burial pre-dates all major religions ... so the practice is adopted by the religions rather than the religion being the basis for it.
... I advocate cremation for everyone, ...
On an oak barge\ship floating on the sea ...
My parents died a while ago, and they are still in cardboard boxes, which we plan to mix with their favorite alcohol and then sprinkle in the bay in front of their home.
Another thought is to mix the ashes with clay and make garden gnomes.
Enjoy