Normal ice will not do it for frozen meat. I put dry ice in with the frozen meat and duct tape around the lid of the cooler and have kept meat frozen much longer than 20 hours. Make sure that your cooler is full with no large empty spaces. Shredded paper on top of the meat packages does a good job of both filling the remainder of the cooler and adding some insulation.

Thanks for good info. The meat I will be carrying will be frozen already from the processor, just wanting to keep it frozen until I make it home, which non-stop is about an 18-19 hour drive. I too have the Coleman ice chest, didn't want to spring for the high dollar coolers if they are not going to perform any better than what I have.

I live in Florida and have been hunting in Florida for a while. This is how we do it. When you shoot the deer hang it up, clean it, quarter it, then throw everything in the cooler and put it on ice. And just drive home. 30lbs of ice lasts about 2 days in my cooler at about 70 degrees outside. Oops just saw the meat is already processed. That I don't know.