Your call.. I'd keep it hot.. but if you do plan on cooling it, I'd probably plan on using some bags of ice to help the refrigerator. I doubt a regular refrigerator will cool that much meat quickly enough if it all goes in hot at the same time.
Our health department rates cooling and reheating a higher risk category than just cooking and holding for just that reason.
4000 sq inch Wood Burner named Brutus - KCSB member/judge# 32129