If it was easy and reasonably inexpensive for my children to arrange a simple burial that allowed my body to decompose naturally (no coffin, no embalming, just a biodegradable shroud), that would be my preference.
No need for anything as grisly as a wood chipper (Good grief - tell that guy to stop watching "Fargo.") because Nature is pretty good at absorbing and repurposing the remains of all creations. Whether tiny amoebas, mighty sequoias, giant whales, crickets, dinosaurs, humans, or tiny seas creatures that form coral, nature is the ultimate green janitor. If she were not, we'd be up to our keisters in dead creatures.