Do they have large freezers in these holiday apartments then? As I am assuming the Mc's would have had to recover the body from wherever they had hidden it, to freeze her in apartment 5a? Or are you suggesting they took her from the freezer in 5a to a freezer in the other apartment, or left her hidden wherever she was and then retrieved her when they were in the new apartment when they had the eyes of the world on them, or did they ask a kind friend to retrieve her body and store her in their freezer for them?
No this is the hypothesis before moving inside premises to freezer:
"Portuguese media claim that police believe Madeleine McCann was buried in a roadworks trench outside a church. It is reported the police are planning to launch a dramatic dig in the hope of finding traces of Madeleine.
However, they say they do not expect to find the youngster herself, as they do not believe it was her final resting place. According to reports, police believe the couple only buried their daughter outside the Church of Our Lady of Light temporarily."
Getting those church keys only days later makes it an interesting theory and Smithman was last seen heading in the direction of the church.