You could use that body to guard your treasure by burying her/him on a layer above the treasure knowing that people might have superstitions about finding and moving a dead body. That is what the ancient pirates did.
"Anybody willing to volunteer to guard the treasure while the ship is away" A newbie member of the crew might fall for that trick.
The worst was the hole I dug for a cesspool - by hand. It was a little over 6 feet deep,but barely 2-1/2 feet wide. After the first 4 feet, I had to lay on the ground, lower myself into the hole - head first - to pull the shovel high enough to get the dirt into a little soup can ... then pull the can out, empty it and repeat.
i dug a hole with a pickaxe when i was sleeping outdoors, i was thinking of sleeping in the hole to cover myself during winter, but now i dont think it was a bright idea.