That is what I was thinking. Good idea, but it will put to much weight up high. On a rough road, it will be moving around. Just the normal play in the hitch will cause it to move a lot by the time you get to the cooler. Hope it works for you.Have you had anyone follow you with that rack mounted, I'll be it won't stay still, may even slap the trunk. Putting a full ice chest on it will make it even worse. Seriously have someone follow you on some rough roads, Best of luck.