Just to add on to what
@23PYP6MT started here, I too have the need for a jumbo sized cooler to keep inside my car.
I ended up with a 150qt Igloo Marine. There is about 1/8" clearance on each side. I am able to open the lid just enough to make it work. I made a little PVC kickstand to keep the lid open. The only thing I use this particular cooler for, is to hold and transport whole fish.
Before a trip, I'll go to Costco and get about 100lbs of ice and leave it in the bags. If fishing was successful, I remove the bagged ice, put tuna, dorado and/or yellowtail in and cover with the unbagged ice. So far, largest fish to go in the cooler is a 50lb Bluefin Tuna. 30lb Yellowtail maxed out the length!
I usually wait till next day to process the fish. I use a 1-gallon pitcher to remove the ice and water. I lay a folded over towel on the cargo bed and open hatch to catch any drips of dirty water. Even after owning the car for over a year, it still has a subtle hint of "new car" smell.
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