My family suggested the process of grilling chicken on a thursday, freezing, traveling 8 hours by car (with meat on ice) on Friday, then reheating to serve on Saturday. Is this safe to consume?
It depends. The chicken cannot be at above 40 degrees for more than 2 hours. If it is frozen, and kept on ice it might be fine. I would store it with a thermometer and periodically check that it is still an appropriate temperature. If it stays frozen or refrigerator temperature for at least 6 of those hours, then you're fine.