That offers too much chance for public health problems. I propose individual disposal, vertically, beneath existing utility poles.
With a hydraulic service truck, remove and lift the line pole. Insert the body, either feet or head end first. Replace pole, and repeat as necessary.
I don't care if the guests of honor are completely dead yet or not. If not, they won't be going any place.
Wouldn’t that cause a subsidence problem with the pole as the carcass decomposed?