I suggest you do it around 3 AM, by the side of a steep hill.
Use a shovel borrowed from a community garden or some other place with easily accessible shovels, and wear gloves while digging.
You see, you've got to go out to sea, all the way out in the middle of nowhere and dump them.But if you don't own a boat, then go out to a gas station, dump the body, and burn the entire gas station.