Your question is one I have received many times around the Thanksgiving Holiday. Your Fresh 18-pound turkey has been packed in an airtight bag. By you keeping that turkey in a 37-degree refrigerator until Thanksgiving it will not spoil. That turkey will be perfectly safe for roasting, as long as you keep in the refrigerator until the day you use it.
If you have any questions Thanksgiving morning, I will be on the Los Angeles Channel 5 Television KTLA. If you are not in the L.A. area, it can be seen through the internet that morning as well….. by tuning into KTLA.com……
Best Wishes for a Great Thanksgiving Dinner,