There was, in fact, a bodysnatching attempt on 8/29/77. Four men, Ronnie Lee Adkins (Ron 'Bear' Tyler), Bruce Nelson, Raymond Green & Gary Travis were apprehended on the night of 8/29/77 for attempting to steal Elvis's remains. I have also read where Vernon had just placed Elvis there temporarily until Elvis could be buried (not reburied - he was never 'buried' in the first place - only entombed) at Graceland when permits could be issued but I have also read where the bodysnatching was a setup so that the Memphis city council would act faster on issuing the permits for Elvis (and Gladys) to be placed at Graceland. The move to bury Elvis at Graceland occured in the early evening hours of October 2, 1977. In the book, "The King Is Dead", Robert Kendall (Elvis's funeral director) incorrectly lists the move as taking place on October 15, 1977.
I have also comminicated with one of the men (Ron 'Bear' Tyler) about the bodysnatching attempt and he told me that it wasn't a setup so....who knows who is telling the truth?