Well, you don't hafta fill BOTH of 'em with ice!!!....$5 bucks worth of ice should be sufficient in only one of 'em....and, if you're real stingy, just fill and freeze a couple of gallon jugs with water....they'll prolly last all day long....just trying to give you some ideas to keep your fish fresh and edible!!!
And, 83 degree surface water is like sudden death to a fish that's been holding deep in a much cooler strata of 8-10 feet water.