I have read some very positive thoughts on this thread. My version of reality is to dispose of the body quickly (& respectfully) before sundown the following day after death. Burial is usually the easiest, quickest, most respectful method. I refer to the books, "Pulling through" by Dean Ing & "The Stand" by Stephen King as two separate methods of body disposal; in 2 different situations.
If societal functions are broken down to the "there ain't no undertakers" point, later retrieval may not be realistic to begin with. Armies have traditionally buried there dead in 1 area near the battlefield. They record the info and mark the grave and move on. That is basically the plan that I have.
My personal experiences dictate that burial takes place as soon after death, as possible. I am concerned with the survivors more than the dead. The dead will now catch up on all of that sleep that they missed out on while they were alive.