This is as close to RVing as I'm probably as I'm ever going to get. I needed to buy an ice chest to use while waiting for refrigerator parts to be delivered. I don't know much about ice chests. I bought a plastic (?)Coleman at Target. But, I'm wondering if I would be better off with a metal ice chest? Also, for bonus points how many blue freezy-type things do I need for a 60 quart ice chest?