Corpse disposal:

Get rid of at least half your corpse.

Eat as much of yourself as you can until you die from blood loss.

I’m serious, start with your exterior limbs, remember to chew, and then peristalsis & your digestive acid will take care of the rest.

And, if you do this in an area that no one goes in for hundreds of years, the rest of your corpse will decay by itself.