One feature of many of our cemeteries in this area of west Michigan is the caretakers building or shed. Not only are they used for storage of mowers and other maintenance equipment, but in winter they may become the temporary resting place of the deceased, until the ground thaws.
Below is the building from Prospect Hill Cemetery, in White Cloud. It is very familiar to the original Maple Grove building, being of stout bricks, and close to the same size.
I do know that the families are notified in the spring, before the burials. Both in the case of my mother-in-law, who died in January, and my father, who died in December were delayed burials and in each case, the funeral home notified us before the internment.